D.60 High
Your boiler is repeatedly shutting itself down as a safety precaution because it is becoming too hot.
Technical description: Number of safety temperature cut off
Typical repair cost: £120-£350 (including labour)
DIY fix possible
Check that your home's radiator valves are fully open to allow water to flowEnsure your thermostat and programmer are calling for heatCheck that the boiler pressure gauge is in the green zone (usually 1 to 1.5 bar)
Protect yourself from future repair bills
A boiler cover plan would cover faults like D.60 — no call-out fees, no surprises.
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Parts commonly replaced
- Circulation pump
- Primary heat exchanger (flushing/cleaning)
- Flow and return thermistors
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