BoilerFaultCodesYour boiler has encountered a general operational error, likely due to an interruption in the gas supply or a failure during the ignition process.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Operating errors
What causes this fault?
This fault occurs when the boiler attempts to light but fails to detect a stable flame, causing the system to shut down for safety. It is often caused by a lack of gas reaching the burner or a worn-out spark probe that can no longer ignite the fuel. In some cases, the internal control board may be failing to send the correct signals to the gas valve.
DIY fix possible
Check that your gas emergency control valve is in the 'on' positionIf you have a pre-pay meter, ensure it has sufficient creditPress and hold the 'Reset' button for five seconds to restart the boiler
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like E (number) — no call-out fees, no surprises.
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Potterton Powermax HE is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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