BoilerFaultCodesYour boiler has shut down multiple times because it reached a dangerously high temperature and is recording how often this safety limit has been triggered.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Number of safety temperature cut offs
What causes this fault?
This fault occurs when the boiler's internal water temperature exceeds safe limits, forcing the system to shut down to prevent damage. The most common reason is a lack of water circulation, often caused by a failing pump or a blockage in the heat exchanger that prevents heat from leaving the unit. It can also be triggered by faulty sensors that are incorrectly reading the system temperature.
This issue often surfaces when the heating is first turned on after summer, as pump components can seize up during long periods of inactivity.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like D.60 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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