2 High
Your boiler has sensed it is getting too hot and has shut itself down as a safety precaution.
Technical description: Overheat boiler lockout
Typical repair cost: £100-£350 (including labour)
DIY fix possible
Check that your radiator valves are open and not turned to the off position.Ensure your system pressure is at the correct level (usually between 1.0 and 1.5 bar).Press and hold the 'R' or Reset button for a few seconds to see if the fault clears.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 2 — no call-out fees, no surprises.
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Parts commonly replaced
- Overheat Thermostat
- Circulation Pump
- Thermistor
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