F.01 / F.1 High
Your boiler has stopped working because it cannot communicate with the sensor that monitors the temperature of the water returning to the unit.
Technical description: Return temperature sensor interruption
Typical repair cost: £95-180 (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 F.01 / F.1 — no call-out fees, no surprises.
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Parts commonly replaced
- NTC Return Temperature Sensor
- Wiring harness / Cable loom
- PCB (Printed Circuit Board)
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