F.00 High
Your boiler has lost connection with its internal temperature sensor, meaning it cannot monitor heat levels and has shut down as a safety precaution.
Technical description: NTC Faults
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.00 — no call-out fees, no surprises.
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Parts commonly replaced
- Flow NTC thermistor
- NTC wiring harness
- PCB
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