D.5 Low
Your boiler is displaying a status message to show the temperature it is currently trying to reach for your heating or hot water, rather than being a functional fault code.
Technical description: Set value of flow temperature or target value of return
Typical repair cost: £0 (including labour)
DIY fix possible
Check your thermostat or controls are set to the desired temperatureWait for the boiler to complete its current heating cycleNo action is required as this is an informational status code
Protect yourself from future repair bills
A boiler cover plan would cover faults like D.5 — no call-out fees, no surprises.
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