F.65 High
Your boiler's internal control board is getting too hot, usually because it is located too close to a heat source or there is a fault with the electronics.
Technical description: Electronic temperature error could be overheating due to external influences
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 F.65 — no call-out fees, no surprises.
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Parts commonly replaced
- Printed Circuit Board (PCB)
- Electronic Control Box
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