BoilerFaultCodesYour boiler is currently providing hot water to your taps or shower, which is a normal status message rather than an actual fault.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Hot water demand
What causes this fault?
This status appears when the boiler detects that a hot water tap or shower has been turned on, triggering the internal flow sensor. It indicates that the burner has fired up specifically to heat the water for your domestic use rather than for your central heating. Because this is a normal operational message, it does not mean your boiler has stopped or broken down.
DIY fix possible
Check if a hot water tap is accidentally left runningEnsure there are no dripping taps or leaking hot water pipesSimply wait for the message to disappear once you finish using hot water
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A boiler cover plan would cover faults like D.22 — no call-out fees, no surprises.
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