If your boiler isn’t working, there are several steps you can take to troubleshoot and perhaps resolve the issue. Other times, professional help may be needed.

Check your home’s power supply

See if the boiler is receiving power. Check that the circuit breaker hasn’t tripped, and the fuse hasn’t blown. Make sure your gas supply is on. You can check by seeing if other gas appliances, like your cooker, are working.

Then check that the water supply to the boiler is on and water is flowing through the pipes. Make sure the thermostat is set to the right temperature and is switched on. Sometimes, it could be as simple as adjusting the temperature settings.

Check the boiler pressure

Most boilers will have a visible pressure gauge. If it’s too low, or below one bar, the boiler may not work. You can repressurise the boiler yourself by following the instructions in the manual or on the boiler itself.

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Reset the boiler via the button

Many modern boilers have a reset button. If you’ve experienced a temporary fault, resetting the boiler might solve the issue. Hold the reset button down for a few seconds, and then wait to see if the boiler restarts. Check your manual for specific instructions and follow these carefully.

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Check the error codes

If your boiler has a digital display, it may show an error code. Refer to the boiler’s manual to identify the issue. Some errors may require professional assistance, while others might be something you can fix yourself.

Bleed the radiators using the key

Air trapped in radiators can cause your heating system to malfunction. Bleed the radiators using a radiator key to release any trapped air. This can restore the proper circulation of hot water.