E110 High
Your boiler has shut down because it has detected it is getting too hot too quickly, usually caused by poor water circulation or trapped air.
Technical description: Boiler max temperature exceeded for gradient (probable pump jammed or air in the circuitBoiler max temperature exceeded for overtemperature (probable pump jammed or air in the circuitSafety thermostat sensor tripped.
Typical repair cost: £100-280 (including labour)
DIY fix possible
Check that your radiator valves are open and not turned to the off position.Carefully bleed your radiators to remove any trapped air from the system.Restart the boiler by turning the selector switch to the reset 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
- Main heat exchanger (descaling)
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