F10 – A10 High
Your boiler's internal sensor has stopped correctly monitoring the water temperature as it leaves the unit, preventing it from heating up properly.
Technical description: Flow sensor error
Typical repair cost: £90-180 (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 – A10 — no call-out fees, no surprises.
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Parts commonly replaced
- NTC Flow Sensor
- Wiring Harness
- Main PCB
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