Water pressure High
Your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.
Technical description: With boiler off and system cold fill system to 1.0 bar and bleed radiators if fault continues contact an installer.
Typical repair cost: £0-120 (including labour)
DIY fix possible
Locate the filling loop (usually two blue-handled taps or a braided hose under the boiler)Slowly open the taps until you hear water flowing and the pressure gauge reaches between 1.0 and 1.5 barClose both taps tightly and reset the boiler if the fault code remains
Protect yourself from future repair bills
A boiler cover plan would cover faults like Water pressure — no call-out fees, no surprises.
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Parts commonly replaced
- Filling loop
- Expansion vessel
- Pressure relief valve
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