F.13 High
Your boiler has stopped working because the water pressure is too low, and it has shut down to prevent damage.
Technical description: The appliance is blocked because of a water deficiency.
Typical repair cost: £0-120 (including labour)
DIY fix possible
Check the pressure gauge on the front of the boiler or under the casing.Locate the external filling loop (usually a silver flexible hose with small taps).Open the taps slowly until the pressure needle reaches between 1.0 and 1.5 bar, then close them tightly.Press the reset button on the boiler control panel.
Protect yourself from future repair bills
A boiler cover plan would cover faults like F.13 — no call-out fees, no surprises.
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Parts commonly replaced
- Filling loop
- Boiler pressure sensor
- Pressure relief valve
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