110 High
Your boiler has likely overheated or a safety sensor has detected that it is running too hot, causing the system to shut down for safety.
Technical description: All Boilers
Typical repair cost: £100-280 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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
- Water pump
- NTC thermistor
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