What the manual says
Manufacturer manualHeating remaining cut off for XX amount of time
From this model's manual
Verified against the Vaillant Combi Compact 242eb installation & service manual.
DIY fix possible
Check if your room thermostat is set high enough to call for heat.Wait up to 15 minutes for the 'anti-cycling' timer to finish.Ensure all radiator valves are open to allow heat to dissipate.
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