Why does my boiler ...

Frequently as Questions:

Why is my boiler not firing up?

Common causes:

• No power or gas supply = You check your gas meter and electric meter before contacting an engineer.

• Low water pressure = You can top up your boiler water pressure. Ideally should be on 1.5 bar. See video clip to the right. If you cannot do this, then contact an engineer.

• Faulty components (pump, fan, PCB, sensors) = this will require an engineer.

Why have I not got hot water?

• Boiler fault or no power = check electric meter before contacting an engineer.

• Faulty diverter valve (combi boiler) = engineer required.

• Low system pressure = top up boiler pressure.

• No gas supply = check gas meter before contacting an engineer.

What 3 things could cause a boiler to trip?

• Electrical fault (short circuit, power surge) = engineer required.

• Overheating (due to circulation issues or blocked heat exchanger) = engineer required.

• Low water pressure or water leak = top up pressure before contacting an engineer.

What does red light on my boiler mean?

• Warning or fault — boiler has detected an issue and may have shut down. Check fault code or manual. Try resetting the boiler before contacting an engineer.

Will my boiler explode?

• Extremely unlikely. Modern boilers have multiple safety features to prevent dangerous pressure build-up or overheating. If you are worried about your boiler contact an engineer who can carry out safety checks and advise.

Will my boiler work without gas or electricity?

• Without gas: No, it cannot heat water or radiators.

• Without electricity: No, modern boilers require power for controls, pumps, and ignition.

My room thermostat says boiler is on but I have not got heating
Possible reasons:

• Circulation pump fault = engineer required.

• Air in system or radiator valves closed = check radiators before contacting an engineer.

• Boiler not responding to thermostat signal = try reparing (paring up the thermostat and receiver) before contacting an engineer.

What does red light on my room thermostat mean?

• Low battery, signal error, or fault. Refer to thermostat manual — red often means it’s not controlling the boiler correctly. If still having issues contact an engineer.

Why is my Smart Thermostat not working or connected?

If you are experiencing an issue and cannot resolve it yourself we are more than happy to attend. Contact our office who will schedule an engineer. We try to attend same day or latest next day.

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