Customer FAQs

Here you'll find our most frequently asked questions specific to the end users of our appliances.

Access the most frequently asked questions and details about our products and services.

General Questions

Installation and operation manuals for Bosch water heaters can be found on the Bosch web site at this link .

A hot water heater should be installed as close as possible to the most frequently used hot water point. Other factors which may influence the installation position include the length and size of the gas supply pipe, the length of hot water pipe, position of existing doors and windows on the house. Australian Plumbing Standards include minimum clearances and distances which installers must meet.

In most situations a Certificate of Compliance is required. The installer will be aware of any additional state-dependent plumbing regulations which affect the installation.

Yes. Only suitably qualified plumber/gasfitters are permitted to install gas hot water heaters. The installing plumber/gasfitter is qualified to install and commission gas appliances, and is able to advise on the operations of the gas appliance upon completion of the installation. The installer is authorized to issue a Certificate of Compliance at the completion of the installation

In most domestic water supplies in Australia, Bosch hot water units are suitable, however in areas with poor quality water, for example bore water or non-towns water, Bosch water heaters may not be suitable. All water heater installation and operating instructions now include the attached water quality statement.

In most domestic water supplies in Australia, Bosch hot water units are suitable, however in areas with poor quality water, for example bore water or non-towns water, Bosch water heaters may not be suitable. All water heater installation and operating instructions now include the attached water quality statement.

View this link to see our warranty and servicing information.

The temperature and flow rate fluctuations could be caused by a number of things - insufficient gas pressure, low or high water pressures, difference between cold and hot water pressures. The best way to deal with this situation is to have your Bosch Hot Water unit inspected by a suitably qualified plumber/gasfitter familiar with the Bosch water heaters. Bosch units should be commissioned on installation and regular services at intervals of every 2 years which should ensure such fluctuations do not occur.

The unlocked OptiFlow product is able to be used in solar applications if required. A controller will be required to adjust the outlet request temperature as required by local regulations.

If the older HighFlow version is used then ensure that the serial number has an “H” to confirm solar suitable and able to accept high temperatures.

Your local licensed plumber/gasfitter will be able assess your hot water requirements and suggest the appropriate model for your application while taking into account the regulations governing installation of gas appliances. Strict safety rules prevent gas appliances from certain indoor applications so it very important to have the installation and ventilation checked.

Most plumbing and trade stores have access to supply Bosch water heaters.

Contact Bosch on 1300 30 70 37 to discuss a suitable product and place of purchase or a complete supply and install option.

Refer to this link to find a service technician.

Please telephone the Customer Contact Centre on 1300 307 037, and the operator will assist you with the contact details of a Service Agent near you. Bosch has a comprehensive network of Authorised Service Agents around Australia, each of whom will be able to service your water heater.

Refer this link to find a service technician.

Bosch recommends a safety and service inspection at least every 2 years, and a recommended service checklist is available from Bosch which should be completed by the attending service technician.

Bosch warranty covers manufacturing defects that may occur with the appliance. Issues caused by faulty plumbing or poor installation and commissioning are not covered by the manufacturer’s warranty. In addition regular maintenance is required and failures caused by correct or lack of maintenance are not covered by warranty conditions and therefore charged to the customer.

External issues that may cause the unit to fault but are not covered by the warranty could but limited too. poor inlet gas supply, faulty and sticking regulator NG regulator, LPG gas regulator issues or sizing, LPG cylinder sizing vaporisation rates, water pressure, dirty water, water outside the specified range, incorrect installation, poor tapware, restrictions and blockages.

For full conditions refer to the warranty statement found in the installation instructions or available here .

Each product has a warranty which covers any manufacturing faults. The specific warranty period for your Bosch water heater can be found in the appliance Installation and Operating manual, or visit the warranty and servicing page .

Bosch recommends that your water heater should have a full service, safety, and performance check carried out at least every 2 years by a qualified plumber/gasfitter familiar with Bosch hot water heaters. Bosch can provide a checklist with recommended service criteria. Bosch can also recommend Bosch accredited service technicians.

To find your nearest service technician, click here .

Bosch has a comprehensive network of Authorised Service Agents around Australia, each of whom will be able to service your water heater. Please telephone the Customer Contact Centre on 1300 307 037, and the operator will assist you with the contact details of a Service Agent near you.

Alternatively you can use our installer locator by clicking on the link .

Periodically inspect the water heater location to make sure there is no flammable materials or rubbish leaning on or near the appliance, and that the surrounding area offers safe access by a service technician if required. The consumer should also check that the water heater is securely fixed to the wall, the flue is free of any obstructions, that there are no heat marks or black sooting present on the wall on which the appliance is mounted.

Cover off inspection:
• Ensure no vermin; e.g. spiders, ants etc. are living in the appliance.
• Operate water heater and ensure that flame is blue (not yellow), check general condition of the appliance and wiring.
• Please note: Plumbers and gasfitters are trained and experienced in the servicing and safety inspections of the gas appliances. Servicing must be carried out only by these qualified people.

Gas safety standards and state based regulations require that only qualified service technicians work on gas appliances. Servicing by a non-qualified person is not permitted. Please telephone the Customer Contact Centre on 1300 307 037, or use our service technician locator to assist you with the contact details of a service technician near you.

To find a service technician, click here .

Please contact Bosch Hot Water and Heating on 1300 30 70 37 to explain what problems you are experiencing with your water heater or heating system. A Customer Service representative will assist you to resolve the issue. This may include sending out a service technician on behalf of Bosch Hot Water and Heating to assess the water heater or heating system. Also please remember to keep a copy of the invoice and serial number handy when calling our Customer Service Team.

Customers will be charged if the issue is found not to be covered by the Bosch warranty. However it’s better to pay a trained service agent to resolve your issue than involving another less experienced plumber / gasfitter.

There is not really anything a consumer can check other than to see if there may be a smell of gas around the water heater. You should ask a plumber to inspect all gas piping and connections on the household gas supply line to check for any gas leaks and seal them if found. Have the appliance be serviced to ensure correct operation which will ensure maximum energy efficiency.

Bosch external water heaters are designed to be installed outside, and where there are ants, spiders, and other small creatures, they can enter the water heater through the air intake openings in the water heater. Since the air is necessary for complete combustion of the gas, these openings cannot be blocked off. We recommend performing regular inspections around the appliance, and if the vermin infestation continues, consult with a qualified pest exterminator about possible solutions based on local conditions. The use of flammable sprays around the water heater is only advisable after the appliance is turned off and disconnected from the power supply. If you do spray around the water heater, you should wait 30 minutes before turning on appliance.

In most domestic water supplies in Australia, Bosch hot water units are suitable, however in areas with poor quality water, for example bore water or non-towns water, Bosch water heaters may not be suitable. All water heater installation and operating instructions now include the attached water quality statement.

View it here .

Bosch OptiFlow / HighFlow water heaters are suitable with most tap ware but some fixtures are designed to restrict the flow of water. Bosch OptiFlow / HighFlow water heaters have a minimum flow rate to activate and when mixing hot and cold, the flow rate through the hot water system may be too low to keep the burner alight. The use of a controller would assist in this circumstance as the customer can request the temperature and only turn on the hot water tap. Alternatively, the plumber can inspect the plumbing fixture.

The Bosch OptiFlow / HighFlow water heater cannot compensate for the poor or faulty plumbing or blockages in water lines. A plumbing inspection should take place and old or faulty tapware replaced. Most tapware have inbuilt filters or strainers to aerate and create smooth flow of water. These should be inspected and cleaned as they could be restricting the flow of water.

When a hot tap is opened, the OptiFlow / HighFlow water heater will ignite within a few seconds and begin heating the water. The additional time taken for the hot water to get to the hot tap depends on the length and size of the household’s hot water pipe between the water heater and the hot tap. This may take up to 60 seconds depending on the specific set up of the hot water.

The Optiflow and HighFlow products are continuous flow water heaters. They do not store any hot water in the system which makes then energy efficient compared to the gas storage which operates like a large kettle.

When the hot water tap is open, the unit will start the ignition process, open the valves, operate the burner and start delivering hot water. Often the time to deliver hot water is influenced by the length of the hot water piping and insulation characteristics.

There is no set time for hot delivery to the tap as each application and installation differs but 45 seconds or greater can be normal.

There are two (2) things you can check. You can check the electricity supply to the OptiFlow / HighFlow:

· Make sure all the hot water taps are off, then turn off the power point where the appliance power is connected, and remove the power lead from the socket. Wait for at least 30 seconds before plugging into the power point again and switching on the power. Wait for at least one (1) more minute while the OptiFlow / HighFlow carries out its own diagnostic check, (the Optiflow unit fan will operate for 20 seconds) then turn on a hot water tap and test for hot water.
You can also verify that the gas supply is available:

· Check other gas appliances to see if they are operating correctly (gas cook top, gas heating appliance). For customers using natural gas please check the gas meter assembly ensuring that the main valve is open. Contact your local gas authority if no gas is available or the gas valve is turned off as there may be a reason. For customers using LPG, check that the gas cylinders are heavy or full. Ensure that the supply valve is open. Check Elgas website for checking cylinders.

Yes. The power should remain on at all times. In cold climate areas the power also provides frost protection for the appliance. If the water heater will not be used for extended periods, it is recommended that the system be drained of water.

Plumbing regulations allow only minor adjustments to the outlet temperature of a locked 50°C OptiFlow / HighFlow heater. The outlet temperature at the nearest sanitary fixture must not exceed 50°C after the minor temperature adjustment. This adjustment must be performed by a licensed plumber using a temperature selector pad or OptiFlow Controller.

Bosch supplies OptiFlow / HighFlow models that are locked to deliver a maximum temperature of 50°C. These water heaters can be installed in situations where 50°C is required (based on state based regulations). The installation of a tempering valve is not required as the water heater conforms to the Australian Plumbing Standard. The water heater will only supply a maximum of 50°C to all the plumbing fixtures connected to the water heater.

Standard Bosch OptiFlow / HighFlow water heaters are factory set to supply water at a temperature of 55°C. The temperature of the hot water delivered by these units can be increased to as high as 70°C, which means that a tempering valve may need to be installed in the house for safety.


Bosch also has available OptiFlow / HighFlow models that are locked at a maximum delivery temperature of 50°C which means that a tempering valve is not required to be installed in the house. These locked water heaters cannot be unlocked to deliver higher temperature hot water.

Yes. The installing plumber can adjust the outlet temperature by adjusting settings using a temperature selector pad. Special consideration should be given to the need to increase temperature based on the application and hot water requirements to prevent scalding.

Bosch offers temperature selector pads as accessories which can be attached the Bosch OptiFlow / HighFlow water heaters. These temperature selector pads give the user the ability to select the outlet water temperature of the water heater. The default hot water temperature from an unlocked OptiFlow / HighFlow water heater can be increased from 55°C up to 70°C by the installing plumber. Retro fitting of temperature selector pads is possible with minimum difficulty. You may not have more than one temperature at different outlets at the same time; the hot water unit can only deliver one temperature at a time, even though you may have multiple temperature selector pads.

Please refer to the customer manuals provided with the product to understand how to adjust priority from a main to a bathroom controller.

The noise you can hear is the water valve readjusting its position in response to a change in the ambient temperature.

The unit makes this automatic adjustment in preparation for the next time that that a tap is opened to deliver hot water.

This adjustment prepares the unit to generate hot water with maximum responsiveness and efficiency.

If the customer has a Bosch controller connected than the display should indicate the current fault, refer to the product manual to understand the current fault.

If the Optiflow has a Bluetooth function then you can connect to the appliance via the Bosch Water App to establish the current fault code.

See how to connect to the App here .

To reset the Optiflow and HighFlow unit you should turn off the water to the appliance and then turn off the power to the appliance, remove the power lead from the power point, wait 30 seconds and then plug back into the power point.

When the HighFlow unit is turned back on you may hear a small sound

When the Optiflow unit is turned back on the fan will operate for approx. 20 seconds as an initial purging.

If you doubt the power supply then check the power point by operating a different tool / appliance or plug the appliance into an alternative power point using an extension lead.

Temperature fluctuations can be caused by, incoming water supply and pressures, incoming gas supply and pressures and plumbing fitting and connection the water heater. These should only be checked by a qualified plumber or service technician using suitable equipment and measuring devices.

Consumers can perform simple checks like, ensure the gas valves at the meter or cylinders are fully open, and check that the supply valves at the hot water system are open correctly.

Tapware in the house can also create restrictions and it is important to regularly inspect the water restrictors and aerators to ensure not blocked with grit and grimes.

In some situations the water heater performance may benefit if the water restrictors are removed.

The warranty offered by Bosch covers any manufacturing defects in the product as detailed in the attached warranty statement.

The warranty doesn’t cover faults external to the product such as water, gas and power supply to the unit or other performance issues caused by external factors.

If the unit is not covered by the warranty then the customer will be charged for the inspection of the appliance. However we suggest that it is better to make payment to our trained service agent to inspect the water heater and provide an educated evaluation on the performance of the unit than involving another plumber.

After the LPG cylinder is replaced air may enter the gas piping which cannot be used to support combustion. This is required to be purged from the system.

The best method is to operate the gas cooktop for a period of time and observe the flame. If the flame extinguishes then repeat igniting the gas until the air is exhausted and the LPG arrives.

You will often hear the sound change between the gas and the air.

To purge the air using the hot water system turn of the power to the appliance, remove the plug, wait 10 seconds and plug back into the power point.

Turn on the hot water tap fully and allow to run for 5 seconds, Turn off the tap and wait 5 seconds, Turn back on the tap and operate for 5 seconds, repeat the process until hot water arrives.

This process will attempt to ignite the gas in the appliance but will also allow any air to be purged through the ignition process.

Please don’t turn on and off rapidly as this may not perform the full ignition process.

Please allow adequate time for the hot water to travel through the pipes once ignition is achieved.

If no response please ensure the following checks

  • Gas cylinder valves open,
  • Power point on and appliance plugged in. Power at the power point.
  • Controller if connected is on
  • While someone is turning on the tap watch the water heater and listen for the ignition process, feel if heat generated from the flue outlet.

To connect to the Bosch Optiflow Bluetooth appliance please refer to the instructions contained in the installation manual or refer to the video help at this link .

The Bosch installation and customer manual contains a list of the error and service messages that could possible occur.

To download a current customer manual please refer this link .

However without a Bosch Optiflow controller or Bluetooth enabled appliance you cannot view these messages.

To connect to the Bluetooth app refer to the instructions contained in the installation and customer manuals or refer to the video help page here .

Hydropower water heaters use the low voltage electricity generated by the movement of water through the hydrogenerator within the water heater when you open a hot water tap. The low voltage electricity generated by the hydrogenerator turbine provides the power required to ignite the appliance.

No external power is needed. The low voltage electricity generated by the hydrogenerator provides the power required to ignite the appliance

Yes. The Hydro models require a minimum flow rate of 3.5 litres per minute to operate the hydrogenerator, and to activate the mechanical controls. The minimum flow rate will depend somewhat on the position of the water flow selector knob of the appliance, and the water pressure to the water heater.

The external Hydropower models can be installed in locations where the occasional frost occurs, but an Exogel valve is required to be installed to provide adequate frost protection. For locations where frequent frost occurs, an internal Hydropower model or internal OptiFlow would be more suitable, or one of the external Highflow models with builtin frost protection circuit may be more appropriate.

The Hydropower product has a safety time to allow ignition and safe operation. If this short period expires without ignition then a re-ignition attempt will be required. The hot water tap should be turned off, and then on again.

If this fails to work then you can test the appliance with the assistance of a second person. Ask someone to activate a tap while the other stands near the water heater. Once the tap is turned on the person at the water heater needs to observe the water heater. The correct operation of the water heater can be observed by: (a) listening for the spark ignition, (b) observing the main burner flame through the cover.

If the heater still fails to ignite, please call the Bosch Contact Centre on 1300 30 70 37 who will be able to recommend a suitably qualified service technician who will be able to attend your water heater.

Please telephone the Customer Contact Centre on 1300 307 037, and the operator will assist you with troubleshooting or the contact details of a Service Agent near you. Bosch has a comprehensive network of Authorised Service Agents around Australia, each of whom will be able to service your water heater. Bosch recommends a safety and service inspection at least every 2 years, and a recommended service checklist is available from Bosch which should be completed by the attending service technician.

Bosch external water heaters are designed to be installed outside, and where there are ants, spiders, and other small creatures, they can enter the water heater through the air intake openings in the water heater. Since the air is necessary for complete combustion of the gas, these openings cannot be blocked off. We recommend performing regular inspections around the appliance, and if the vermin infestation continues, consult with a qualified pest exterminator about possible solutions based on local conditions. The use of flammable sprays around the water heater is only advisable after the appliance is turned off and disconnected from the power supply. If you do spray around the water heater, you should wait 30 minutes before turning on appliance.

No, controllers cannot be attached to Hydropower model.

The front cover can be removed by loosening the thumb screws on either side of the appliance (thumb screws are not required to be completely removed). Hold the side of the cabinet and pull forward and slightly down which will disengage the front cover. Once free, hold and support cover and safely remove to a suitable location. To reinstall, locate the top of the cover near the top supporting bracket and slide into position, push back, and locate cut outs on thumb screws. (Require pictures of cover removal).

The Hydropower water heater temperature cannot be pre-set like the Highflow products, however, the performance can be adjusted to supply more or less water flow and to increase or decrease the temperature of the unit.

Water Flow: The water flow can be adjusted by rotating the water flow selector knob clockwise for decreased water flow, or anticlockwise for increased water flow. Increased water flow will give lower water temperature, and decreased water flow will give higher water temperature.

Gas Rate: The amount of gas going to the burner can be adjusted by moving the slide from left to right. Sliding to the right will increase the gas burner rate while moving to the left will decrease the gas rate. The gas rate will affect the temperature of hot water delivered by the water heater, this adjustment is useful in situations where incoming water temperature differs significantly from summer to winter.

When a hot tap is opened, the water heater will ignite within a second or two and begin heating the water. The additional time taken for the hot water to get to the hot tap depends on the length and size of the household’s hot water pipe between the water heater and the hot tap.

Yes. Tempering valves can be used with Hydropower models. High performance tempering valves are always suggested to provide complete and safe mixing.

No, this product cannot be used as a solar booster.

Check operation of water heater.

Temperature controller on display.

The majority of Bosch water appliances are designed to be installed externally and all gas appliances require ventilation opening to assist in complete combustion. Where there are vermin including ants, spiders and other small creatures, it is advisable to perform regular inspections on the appliance. Customers should consult with a qualified pest inspector about possible solutions based on local conditions. The use of flammable sprays is only advisable after the appliance is turned off and disconnected from the power supply. Please wait ½ hour before turning on appliances.

Instructions on how to set the time and date can be found in the installation manual, referring to the Bosch you tube channel or the online self help video. Setting the Date can be found in the “Set” section of the controller.

View the How to Video here .

Instructions on how to operate on a program can be found in the installation manual, referring to the Bosch you tube channel or the online self help video.

Setting the program can be found in the “prog” section of the controller and by selecting P1, P2 or P3

Please note that a program timings needs to be set before selecting a program to operate on.

Please note if you set a program the unit will only operate in the defined period to recover the tank. Adequate time needs to be allowed as per the details in the installation / customer manual.

View the How to Video here .

Instructions on how to set a program can be found in the installation manual, referring to the Bosch you tube channel or the online self help video.

Setting up a program can be found in the “Set” section under “Prog” of the controller.

Please note that a program should only be set when power supply benefit can be achieved such as solar PV. The program settings enable the heat pump to operate in the defined periods. If the time periods are not adequate to allow recovery of the tank then adequate hot water may not be available.

View the How to Video here .

Recovery rates for heat pump are listed in the installation manual but will take longer than electric tanks due to the energy efficiency of the system. The outside temperature will influence the recovery rates greatly and in winter a recovery rate of 8 to 12 hours is possible normal.

By pushing the “+” and “-“ keys the unit will enter the “full” function. This will enable the heat pump to perform and boost and will use both the refrigeration and electric element to raise the temperature quicker. This is a onetime boost.

The Boost function speeds up the recovery time.

If the heat pump has a fault with the refrigeration system then it is possible to operate the heating element only.

Please contact Bosch to receive a detailed copy of operating the “HEA” function or refer to the installation and customer manual.

Yes the heat pump creates noise when operating the fan and compressor and this is normal operation. Noise is very subjective and other background noise, walls, fences and distance to surrounding objects will affect the perception of noise. The heat pump should be serviced every 2 years which includes an inspection of the refrigeration system.

The heat pump produces condensate and this is designed to drain from the drain point at the back of the cover. The installing plumber needs to ensure that the appliance is installed level and that they connect a suitable drain hose to the heat pump. If the condensate builds up in the units then it may effect the long term performance of the unit.

Customer can check if the appliance is installed level as part of regular inspection. Ground movement may cause the unit to become un-level.

The tank is also fitted with TPR valve which is also designed to pass water due to thermal expansion. The installing plumber should connect suitable piping to allow it to drain correctly as per the installation standard.

If the heat pump goes into a failure mode then the reset button “OK” can be pushed for 3 seconds to reset the fault and allow the heat pump to operate.

A master reset of the heat pump can also be achieved by entering the “set” function and proceeding to “Fset” pushing “ok” see “rset” pushing “ok” and then observing the 10 second count down.

The temperature will need to be reconfirmed, any program settings reprogrammed, date and time checked and the set point temperature reconfirmed.

The heat pump should be serviced and checked every 2 years. We recommend using our service agents who have information on general servicing of the appliance.

In general we recommend the service cover the inspections of the plumbing systems of the heat pump as well as the refrigeration system which will require the inspection by a refridgeration mechanic.

If E10 fault is showing then it indicates that power is not going to the heating element.

The heat pump controller should be reset by pushing the OK key but the electric element should also be inspected and reset if required. This is behind the cover on the electric tank and 240 volt is present.

Please contact Bosch at 1300 30 70 37 for instructions on this reset procedure.

The heat pump water heater is a sophisticated water heater with many features and functions which require explanation to help our customers.

Additional support can be found by referring to these FAQ’s, technical information sheets, Bosch You tube channel, or by contacting Bosch directly or the place of purchase.

Yes, water quality will effect the performance of the heat pump and this should be considered at the installation stage of the appliance. Water softening is at the discretion of the installing plumber. Where water is not at the defined levels then this could affect the performance of the water heater, create recovery issues and cause fault codes to appear.

Regular servicing including flushing of the plate heat exchanger or associated pipe work is required every 2 years but may be required and shorter intervals where the water is hard.

Issues caused by poor water quality, lack of service and deposits in the heat exchanger are not covered by the manufacturing warranty.

Your water quality should be discussed with your installing plumber or water supplier to understand the water PH levels and total hardness levels.

Refer to our warranty page here .

Bosch Heat Pumps should not be connected to a ring main plumbing system as the ring main pipe work acts as part of the tank and effects the recovery rate and its ability to complete the LEG function which require the tank temperature to be increased.

If a ring main is installed then please discuss the application with Bosch so recommendations can be made.

The Bosch heat pump appliance has a Legionella function which means that the tank temperature needs to be raised to 60c and held for 35 minutes to prevent legionella forming once a week.

If the unit appears to showing “LEG” on the screen it may mean that the units cannot complete this function.

Customers should consider some of the following, reset the appliance, turn of the water overnight in case of water leaks on the hot water piping, ensure the internal pump speed is set to Speed 3 or arranging for a general service of the product.

Yes. In most cases, LP gas is supplied from cylinders located on the customer’s premises. When there is an interruption to the gas supply or no gas in cylinders, the water heater will make repeated attempts to light. If the water heater has not lit after a set number of attempts, the water heater will shut down as a safety precaution, and a reset will be required. Your LPG supplier will be able to discuss possible solutions for supply of LPG based on your circumstances/location and gas requirements.

Your plumber will be able to measure the gas load of all appliances and work out the appropriate gas supply necessary. LPG is best supplied in 45Kg cylinders, and multiple cylinders may be required.

The low temperature potential in your area will also be a factor the plumber will take into consideration because the liquid in the bottle has to vaporizes and low temperatures reduce the ability of the liquid to become a gas.

We also highly recommend that you do not use BBQ cylinders (9 kg cylinders or smaller) with your Hot Water System.

When purchasing your Gas cylinder, we advise that you discuss with your LPG supplier to arrange for an auto change over system for your LP gas to ensure you have a continuous supply of gas. However you must still regularly check to see if the valve has automatically changed and arrange for the empty cylinder(s) to be filled.

An auto changeover system is preferable as this ensures you have continuous supply of LP gas. You must still regularly check to see the valve has automatically changed, and arrange for the empty cylinder(s) to be filled. Please discuss this with your LPG supplier.

  • After the LPG cylinder is replaced air may enter the gas piping which cannot be used to support combustion. This is required to be purged from the system. The best method is to operate the gas cooktop for a period of time and observe the flame. If the flame extinguishes then repeat igniting the gas until the air is exhausted and the LPG arrives. You will often hear the sound change between the gas and the air. To purge the air using the hot water system turn of the power to the appliance, remove the plug, wait 10 seconds and plug back into the power point. Turn on the hot water tap fully and allow to run for 5 seconds, Turn off the tap and wait 5 seconds, Turn back on the tap and operate for 5 seconds, repeat the process until hot water arrives. This process will attempt to ignite the gas in the appliance but will also allow any air to be purged through the ignition process. Please don’t turn on and off rapidly as this may not perform the full ignition process. Please allow adequate time for the hot water to travel through the pipes once ignition is achieved. If no response please ensure the following checks
  • Gas cylinder valves open
  • Power point on and appliance plugged in
  • Controller if connected is on
  • While someone is turning on the tap watch the water heater and listen for the ignition process, feel if heat generated from the flue outlet