6 High
Your boiler has stopped working because its internal components are struggling to communicate with the main control board due to a wiring issue.
Technical description: Internal wiring error
Typical repair cost: £90-280 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 6 — no call-out fees, no surprises.
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Parts commonly replaced
- Wiring harness
- Main PCB
- Internal fuse
*Affiliate links — we may earn a commission at no extra cost to you.