110 High
Your boiler has switched itself off because it has reached too high a temperature, likely due to trapped air or a blockage stopping water from circulating.
Technical description: Overheated – try bleeding your radiators
Typical repair cost: £100-250 (including labour)
DIY fix possible
Turn off the boiler and allow it to cool down completely.Use a radiator key to bleed all radiators to remove any trapped air.Check the boiler pressure gauge and top it up to 1.5 bar if it has dropped.Turn the boiler back on and press the 'Reset' button.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 110 — no call-out fees, no surprises.
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Parts commonly replaced
- Overheat Thermostat
- Circulating Pump
- NTC Temperature Sensor
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