F.75 High
Your boiler is unable to tell if its pump is running correctly, which means it has stopped working for your safety.
Technical description: Error with pressure – no pressure change detection when starting the pump
Typical repair cost: £120-280 (including labour)
DIY fix possible
Check the pressure gauge and ensure it is between 1.0 and 1.5 barIf the pressure is too low, use the filling loop to top it upPress the 'Reset' button (flame symbol with a cross) once the pressure is correct
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
- Expansion vessel (recharge or replace)
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