What the manual says
Manufacturer manualno heating required
From this model's manual
Verified against the Glow Worm Glow Worm 30cxi installation & service manual, page 52.
DIY fix possible
Check your room thermostat to ensure it is set to a higher temperature than the current room temperatureEnsure your programmer or timer is set to an 'ON' periodCheck that your hot water tap is turned on if you are expecting the boiler to fire up
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