BoilerFaultCodesYour boiler has experienced a power cut or was switched off while it was already showing a different fault, causing it to lock itself out for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Interruption Of Power Supply while in fault mode
What causes this fault?
This fault occurs when the boiler loses electrical power—either due to a local power cut or someone switching off the fused spur—while it was already struggling with a different internal issue. Because the boiler was interrupted while trying to process an existing error, it enters a protective 'lockout' state to prevent you from accidentally running the system in an unsafe condition. It effectively gets stuck in a loop between the old error and the sudden loss of power.
DIY fix possible
Locate the selector switch on the front of the boilerTurn the switch to the 'R' (Reset) position and hold it for at least five secondsTurn the switch back to the 'On' position and wait to see if a different fault code appears
Find a Gas Safe engineer
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A boiler cover plan would cover faults like E131 — no call-out fees, no surprises.
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Potterton Promax HE Store 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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