Boiler Fault Codes — Engineer-Verified Index

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Boiler fault codes — FAQs

Can I reset my boiler myself?

A single reset is fine. If the boiler locks out again, stop resetting — repeated resets on an ignition or flame fault can be dangerous and mask the real problem.

Which fault codes are safety critical?

Any code relating to flame detection, gas valve operation, overheat or flue/fan failure should be treated as safety critical and needs a Gas Safe registered engineer.

Are low pressure codes something I can fix?

Usually yes — repressurise to 1.0–1.5 bar with the filling loop. If pressure keeps dropping there is a leak or a failed expansion vessel.

Do you carry parts for these faults?

We stock common fans, pumps, sensors and PCB parts for the major brands, so many fault code repairs are completed on the first visit.

How fast can you attend a locked out boiler?

The line is open 24 hours and we work across Warrington daily, so most lockouts get a same-day or next-morning slot.