270 High
Your boiler has detected that it is heating up too quickly without enough water circulating through it, causing it to shut down to prevent overheating.
Technical description: Dry fire
Typical repair cost: £100-£350 (including labour)
DIY fix possible
Check that your boiler pressure gauge is between 1.0 and 1.5 barIf the pressure is low, top up the system using the filling loopEnsure all radiator valves are open and bleed any trapped air from your radiatorsReset the boiler by turning the selector switch to 'R' for five seconds
Protect yourself from future repair bills
A boiler cover plan would cover faults like 270 — no call-out fees, no surprises.
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Parts commonly replaced
- Circulating Pump
- Central Heating Return Filter
- Overheat Thermostat
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