While you wait for answers, we may have found some information which could help you.
Click here for Heating Radiators Hot Water
Constant rise of water pressure in valiant combi echo plus boiler?
Hot water and Central Heating Not coming on?
Valiant timeswitch 130 control panel?
Valiant combi compact boiler -low water pressure?
hot water on valiant combi does not run very hot?
Leak on overflow pipe?