What the manual says
Manufacturer manualThereisnodemandforheatingmode.
From this model's manual
Verified against the Vaillant Ecotec Plus installation & service manual, page 79.
DIY fix possible
Check your room thermostat or smart controller to ensure the heating is turned onCheck if your hot water timer or schedule is activeEnsure the temperature dial on the front of the boiler is set to your preferred level
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