8 High
Your boiler has stopped working because the internal fan, which clears waste gases, is spinning at the wrong speed.
Technical description: Incorrect fan speed
Typical repair cost: £180-450 (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 8 — no call-out fees, no surprises.
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Parts commonly replaced
- Fan motor
- Printed Circuit Board (PCB)
- Wiring harness
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