F.75 High
Your boiler has failed to detect a rise in pressure when the pump started, meaning it cannot safely circulate water to heat your home.
Technical description: Pressure sensor fault
Typical repair cost: £140-£220 (including labour)
DIY fix possible
Check the pressure gauge on the front of the boilerIf the pressure is below 1.0 bar, use the filling loop to top it up to 1.5 barPress the 'Reset' button (indicated by a flame with a cross through it) to restart the boiler
Protect yourself from future repair bills
A boiler cover plan would cover faults like F.75 — no call-out fees, no surprises.
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Parts commonly replaced
- Water pressure sensor
- Circulation pump
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