Please check whether the boiler is turned on. If there is no heating after the boiler has been turned and you have tried topping up the pressure via instructions from another video provided there maybe a problem with the condensate pipe being frozen (Mainly in months when the weather is below freezing), please follow the below video on how to Thaw a frozen condensate pipe.
If after trying the below video, the issue still exists, report the issue through this system and contact us by telephone.
Office Telephone Number 01443 401114