D Low
Your boiler has paused heating the water because it has already reached the target temperature you selected on the control dial.
Technical description: The boiler has a call for hot water but the appliance has reached the desired temperature set on the boiler
Typical repair cost: £0 (including labour)
DIY fix possible
Check if your hot water taps are turned offReduce the hot water temperature dial slightly if the water is too hotWait for the 'D' to disappear once the water temperature drops and the boiler resumes normal operation
Protect yourself from future repair bills
A boiler cover plan would cover faults like D — no call-out fees, no surprises.
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