Medium
E131 on Main System 18 HE

Your boiler has lost power while it was already trying to report a different error, meaning the system is currently confused and needs a manual reset to restart correctly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Interruption Of Power Supply while in fault mode

Shared across the range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Locate the reset button or dial on the front of your boiler control panel.Hold the reset button for 3 to 5 seconds until the display clears.Wait a few minutes to see if the boiler initiates a new start-up sequence.If the code returns, try switching the boiler off at the fused spur for 60 seconds before turning it back on.

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