111 Emergency
Your boiler has detected too much water pressure in the system, which can cause internal damage or leaks if not addressed.
Technical description: Exceeded maximum pressure
Typical repair cost: £80-200 (including labour)
DIY fix possible
Check that the internal or external filling loop valves are tightly closed.Locate a radiator and use a bleed key to release water into a container until the pressure gauge on the boiler drops back into the green zone (usually 1.0 to 1.5 bar).Monitor the pressure gauge to ensure it stays stable after the boiler is restarted.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 111 — no call-out fees, no surprises.
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Parts commonly replaced
- Filling loop valve
- Expansion vessel
- Pressure relief valve
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