E270 High
Your boiler has detected that there is not enough water circulating inside it while the burner is on, causing it to overheat rapidly and shut down for safety.
Technical description: Dry fire
Typical repair cost: £100-350 (including labour)
DIY fix possible
Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.If the pressure is low, use the filling loop underneath the boiler to top it up.Ensure all radiator valves and the main boiler isolation valves are fully open.Restart the boiler by pressing the 'Reset' button.
Protect yourself from future repair bills
A boiler cover plan would cover faults like E270 — no call-out fees, no surprises.
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Parts commonly replaced
- Circulation pump
- Main heat exchanger
- Flow and return thermistors
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