High
Electrical Fault Finding on Glow-worm Hideaway 40B

Your boiler is not receiving the electrical power it needs to start, likely because the external clock or thermostat is not sending a signal to turn it on.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

No 220 to 240V between 'L' and 'N'. Check that all remote time or temperature controls are calling for duty.

Shared across the Hideaway 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.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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All 12 fault codes on the Hideaway 40B

Seeing a different code? Every code this model can display, in one place.

Electrical Supply FailureNEON1NEON2NEON3NEON4NEON5Neon6Pilot Fault FindingReset neonReset neon lightsThermocouple Fault Finding

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