F000 High
Your boiler has stopped working because one of its internal sensors is sending an incorrect signals or has disconnected, preventing it from heating your water safely.
Technical description: Sensor defect
Typical repair cost: £120-£220 (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 F000 — no call-out fees, no surprises.
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Parts commonly replaced
- Flow temperature sensor
- Return temperature sensor
- Wiring harness
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