BoilerFaultCodesThe 6 most common faults
Your boiler has become too hot and has shut itself down as a safety precaution to prevent internal damage.
Wait for the boiler to cool down for at least 30 minutesCheck that all radiator valves are fully openCheck the boiler pressure gauge and top up to 1.5 bar if it is lowPress the Reset button on the control panel
Your boiler is trying to start up but cannot successfully light the gas to produce a flame.
Check that your gas supply is turned on at the meterIf you have a prepayment meter, ensure you have credit availableCheck if other gas appliances, like a cooker, are working correctlyReset the boiler by following the instructions in your user manual
Your boiler has switched itself off because the water pressure in the system is too low for it to operate safely.
Locate the filling loop (usually a silver flexible hose) underneath the boiler.Open the one or two taps on the loop slowly until you hear water moving.Watch the pressure gauge until it reaches between 1.0 and 1.5 bar, then close the taps tightly.
Your boiler is detecting a flame even though the burner should be switched off, which is a safety conflict causing the system to lock out.
Full guide for A02Your boiler has shut down because the exhaust gases have become too hot, which is usually caused by a blockage or a build-up of debris inside the system.
Full guide for F07Your boiler's internal thermometer that measures outgoing water temperature has developed a fault, meaning the system cannot safely monitor heat levels.
Full guide for F10on the Euroterm E27 Plus
Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.
Call a Gas Safe engineer if…
- You can smell gas or see signs of a leak
- The Euroterm shows an Emergency or High severity code
- The boiler keeps locking out after repeated resets
- You've tried the DIY checks and the fault hasn't cleared
- There's visible water leaking from the boiler
- The flame is yellow or orange instead of blue
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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