E02 High
Your boiler has stopped working because water is not moving through the system properly, which is causing it to overheat and shut down for safety.
Technical description: Problem with the pump circulation
Typical repair cost: £180-350 (including labour)
DIY fix possible
Check that your system pressure is between 1.0 and 1.5 bar on the pressure gaugeEnsure all radiator valves and isolation valves under the boiler are fully openBleed your radiators to remove any trapped air that might be blocking circulationPress the reset button to see if the boiler restarts
Protect yourself from future repair bills
A boiler cover plan would cover faults like E02 — no call-out fees, no surprises.
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Parts commonly replaced
- Circulating pump
- Automatic air vent
- Main heat exchanger (de-scaling)
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