E118 High
Your boiler has stopped working because the water pressure in the system has dropped too low.
Technical description: System water pressure low
Typical repair cost: £0-120 (including labour)
DIY fix possible
Locate the filling loop (usually a silver braided hose with small lever valves under the boiler).Slowly open both lever valves to allow water into the system.Watch the pressure gauge and close both valves firmly once it reaches between 1.0 and 1.5 bar.
Protect yourself from future repair bills
A boiler cover plan would cover faults like E118 — no call-out fees, no surprises.
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Parts commonly replaced
- Filling loop
- Expansion vessel
- Pressure relief valve
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