F.10 High
Your boiler has detected an electrical fault with the internal sensor that monitors the temperature of the water leaving the unit, causing it to shut down for safety.
Technical description: Flow temperature sensor short circuit
Typical repair cost: £90-160 (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.10 — no call-out fees, no surprises.
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Parts commonly replaced
- Flow NTC thermistor
- Wiring harness
- Main PCB
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