119 High
Your boiler has stopped working because the water pressure in the central heating system has dropped too low.
Technical description: System pressure too low
Typical repair cost: £0-120 (including labour)
DIY fix possible
Locate the filling loop (usually a silver flexible hose) underneath your boiler.Slowly open the one or two taps/levers on the hose until you hear water flowing.Watch the pressure gauge and close the taps once the needle reaches between 1 and 1.5 bar.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 119 — no call-out fees, no surprises.
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Parts commonly replaced
- Filling loop valve
- Pressure sensor
- Expansion vessel
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