F10 High
Your boiler's internal sensor that monitors the temperature of water leaving the unit has stopped working correctly, and the system has shut down to prevent overheating.
Technical description: Flow sensor error – sensor damaged, short circuited, sensor damaged or wiring broken
Typical repair cost: £100-180 (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 F10 — no call-out fees, no surprises.
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Parts commonly replaced
- Central Heating Flow Temperature Sensor (NTC)
- Wiring harness
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