Thermocouple replacement in hot water system

thermocouple replacement hot water system sydney

What is the purpose of the thermocouple in a hot water system?

The thermocouple in a hot water system is a device that measures the temperature of the water in the tank or in the pipes.  The thermocouple then provides a signal to a controller or thermostat so the desired hot water temperature is maintained.

In gas hot water heaters, the thermocouple monitors the pilot flame and prevents the gas valve from opening if the pilot light is out. This is a very important safety feature that prevents gas leaks and potential explosions. If the thermocouple detects that the pilot flame is out, it will send a signal to the gas valve to shut off the gas supply until the pilot flame is relit.

The thermocouple plays an important role in ensuring the safe and efficient operation of your hot water systems, as follows:

  • the thermocouple accurately measures hot water temperature
  • the thermocouple provides control signals to maintain the desired hot water temperature
  • the thermocouple prevents dangerous situations such as gas leaks and potential explosion

Hot water heater thermocouple repair and replacement service

To ensure your hot water system is operating safely and correctly, we recommend regular service every 5 years. If you supply our friendly hot water service technicians with the make and model of your water heater, we will be able to determine whether a service call is required.

Book a hot water heater service

To organise a service for your hot water system, contact our friendly team. We offer fast service to all Sydney suburbs. Once onsite, we can check the thermocouple and other important parts are operating as they should.  Our trucks carry thousands of replacement parts and can fix problems on the spot.


Have you been told by a plumber or hot water company that your hot water system can’t be repaired and needs to be replaced – at a considerable cost? If so, contact the hot water specialists here at Cheapa Hot Water for advice. Over the years we have saved countless customers thousands of dollars by undertaking cost-effective repairs to faulty hot water heaters when they had been told they couldn’t be fixed.  Don’t believe us? We can put you in touch with these customers for verification.  A phone call to Cheapa Hot Water may save you thousands! Call 0410 693 532 to speak to a hot water specialist now.

Further reading

cheapa hot water sydney

Cheapa Hot Water Sydney

Hot water is our business – it’s not a sideline. Each year we repair and install hundreds of hot water systems in homes and businesses across Sydney.

  • We offer free delivery of your new hot water system and complimentary disposal and recycling of your old water heater.
  • As one of Sydney’s largest hot water system suppliers, our enormous buying powers and ability to buy direct from the manufacturer means we can pass attractive savings on to our customers.
  • Our fully qualified, licensed hot water heater installers have over 25+ years of experience each. We are fully insured and pride ourselves on our old-fashioned customer service.
  • We are accredited service agents for all the hot water heater brands including RheemDux, Rinnai, Aquamax, Bosch, ConergyHockingApricusVulcanEdwards SolarSolahart, Everhot and more.
  • We are qualified to undertake all the plumbing and electrical work required to install a new hot water system. There is no need to waste time and money employing multiple trades.
  • We have all the equipment needed to install your hot water system today. We don’t have to hire or wait for other trades to arrive with the required equipment.

Save time and money by employing a local hot water expert

Did you know that often the repair and installation of a hot water system requires the expertise and qualifications of both a licensed plumber and a licensed electrician?

We are qualified to undertake any plumbing and electrical work required to ensure your hot water heater is repaired quickly and within budget. Plumbers who do not specialise in the installation of hot water heaters may need to outsource the electrical work required to another tradesperson, thereby holding up your hot water system repair or installation, adding extra expense due to additional call-out fees charged by employing two tradespeople.

Your hot water heater is an expensive appliance. Don’t risk voiding your warranty.

Additionally, most manufacturers won’t cover the terms of your hot water system warranty if it isn’t installed by a licensed hot water technician or a qualified plumber. Hot water tanks are an expensive appliance so why would you risk voiding your warranty by installing it yourself or employing the services of someone who isn’t licensed?

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