Medium
neon flashing (2nd instance) on Potterton Performa 28i

Your boiler is receiving conflicting signals about whether it should be running, which is causing it to restart its warm-up cycle repeatedly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

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

Preheating function starts after 25 seconds. Preheat control is not at minimum position. External control calling for heat. Go to section ‘L’.

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 fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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