I have a C.H system that is 10yrs old - with boiler in garage and hot water cylinder in 1st floor airing cupboard.
Heating and Hot Water run via a '3 Way Motorised Value' in airing cupboard.
After recently turning system off to replace an upstairs tap - ever since i've had the following problem:-
If central heating only on - all radiators work fine
but if both Central Heating and Hot Water on - upstairs radiators work fine but the downstairs radiators get hot at the top but are only luke warm at the bottom - (but then when the hot water turns off - the radiators then fully heat up).
Any suggestions, whats causing this?
Heating and Hot Water run via a '3 Way Motorised Value' in airing cupboard.
After recently turning system off to replace an upstairs tap - ever since i've had the following problem:-
If central heating only on - all radiators work fine
but if both Central Heating and Hot Water on - upstairs radiators work fine but the downstairs radiators get hot at the top but are only luke warm at the bottom - (but then when the hot water turns off - the radiators then fully heat up).
Any suggestions, whats causing this?