E110 High
Your boiler has become too hot and has shut itself down for safety, likely because the water isn't moving through the system correctly.
Technical description: Boiler overheat tripped
Typical repair cost: £90-250 (including labour)
DIY fix possible
Check that your radiator valves are open to allow water to flow.Check the boiler pressure gauge and top up to 1.5 bar if it is too low.Press the Reset button once to see if the system restarts.
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
- Flow/Return Thermistor
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