D.25 Low
Your boiler is currently busy heating your hot water because your smart thermostat or external controller has told it to do so.
Technical description: Hot water activation via eBus control
Typical repair cost: £0 (including labour)
DIY fix possible
Check if your hot water timer is active on your external thermostatWait for the hot water tank to reach its set temperatureNo action is required as this is a status message, not a system failure
Protect yourself from future repair bills
A boiler cover plan would cover faults like D.25 — no call-out fees, no surprises.
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