BoilerFaultCodesTechnical description
Freeze protection – the boiler won’t operate if flow temperature sensor reads a value that is less than 1°c
What causes this fault?
This fault occurs when the boiler's internal sensors detect that the water temperature has dropped to near-freezing levels. The most common reason is that the boiler is located in an unheated area, such as a garage or loft, and the ambient temperature has fallen low enough to risk the internal pipework freezing and bursting.
This fault is almost exclusively seen during the winter months or during sudden periods of extreme sub-zero outdoor temperatures.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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