E9 276 High
Your boiler has shut down because the water inside it has become dangerously hot.
Technical description: Primary flow temperature exceeded 95°c
Typical repair cost: £120-£350 (including labour)
DIY fix possible
Check if your radiator valves are fully open to allow water to circulate.Ensure your system pressure is between 1 and 1.5 bar on the front gauge.Restart the boiler by holding the 'reset' button for five seconds once the system has cooled down.
Protect yourself from future repair bills
A boiler cover plan would cover faults like E9 276 — no call-out fees, no surprises.
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Parts commonly replaced
- Circulation Pump
- Heat Exchanger (Flushing)
- Overheat Thermostat
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