F.00 High
Your boiler has stopped working because it cannot accurately measure the temperature of the water leaving the unit to heat your home.
Technical description: Flow temperature sensor
Typical repair cost: £120-190 (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.
*Affiliate links — we may earn a commission at no extra cost to you. Prices shown are starting prices.
Parts commonly replaced
- Flow temperature sensor (NTC thermistor)
- Connecting lead/wiring harness
*Affiliate links — we may earn a commission at no extra cost to you.