C1 264 High
Your boiler has stopped working because the internal fan, which is needed to safely clear waste gases, has either lost power or stopped communicating with the main control board.
Technical description: No control signal or power supply to the fan during operation
Typical repair cost: £250-£650 (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 C1 264 — no call-out fees, no surprises.
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Parts commonly replaced
- Fan Assembly
- Main Power PCB
- Wiring Harness
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