High
Wiring Harness on Baxi Combi 130 HE

Your boiler has stopped working because of a loose connection or a fault in the internal electrical wiring between the main control board and the internal components.

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

Indicator: Upper LED Flash, Middle LED Flash, Lower LED Off, Bottom LED Off. Ensure 8-way PCB connector securely pushed in. If fault persists replace Wiring Harness.

From this model's manual
Verified against the Baxi Combi 130 He Combi 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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