High
neon flashing (4th instance) on Potterton Performa 28i

Your boiler is trying to start the fire needed to heat your water but is failing to detect a flame after several attempts.

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

Spark at ignition electrodes for up to 10 seconds but no flame. Change main PCB or go to sections H and K.

From this model's manual
Verified against the Potterton Boiler Performa 28i installation & service 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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A cover plan would handle faults like neon flashing (4th instance): no call-out fees, no surprise bills.

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