E110 High
Your boiler has shut down because it grew too hot too quickly, usually because the water inside isn't circulating properly.
Technical description: Boiler Max temperature exceeded for gradient (or overtemperature) Probable pump jammed or air in the circuit or Safety thermostat sensor tripped
Typical repair cost: £100-£280 (including labour)
DIY fix possible
Wait for the boiler to cool down completelyCheck that all radiator valves and the boiler isolation valves are fully openPress the Reset button for five secondsGently bleed your radiators to remove any trapped air pockets
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
- Circulating Pump
- Overheat Thermostat
- Main Heat Exchanger (if scaled up)
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