H.01 – .14 High
Your boiler has detected that it is getting too hot too quickly, usually because water isn't moving through the system properly.
Technical description: Maximum flow temperature value exceeded or insufficient circulation – temporary fault.
Typical repair cost: £100-£350 (including labour)
DIY fix possible
Check that your boiler pressure is between 1 and 1.5 bar on the gauge.Ensure all radiator valves are fully open to allow water to flow.Restart the boiler to see if the temporary fault clears.
Protect yourself from future repair bills
A boiler cover plan would cover faults like H.01 – .14 — no call-out fees, no surprises.
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Parts commonly replaced
- Circulation pump
- Flow temperature sensor
- Main heat exchanger (flushing)
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