E110 High
Your boiler has reached an excessively high temperature and has shut down as a safety precaution to prevent damage.
Technical description: Thermostat operated safety
Typical repair cost: £100-350 (including labour)
DIY fix possible
Check that all radiator valves are fully open to allow water to circulate.Ensure your system pressure is between 1.0 and 1.5 bar on the front gauge.Try resetting the boiler by turning the selector knob to the 'R' position for five seconds.
Protect yourself from future repair bills
A boiler cover plan would cover faults like E110 — no call-out fees, no surprises.
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Parts commonly replaced
- Circulation pump
- Overheat thermostat
- NTC Temperature sensor
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