C1 264 High
Your boiler has switched itself off because it detected that the internal fan stopped moving the air needed for safe combustion around while it was running.
Technical description: Airflow stopped during operation
Typical repair cost: £150-350 (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
- Air pressure switch
- Main PCB
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