I have a Grundfos 15-50 pump - when central heating turned on gets extremely hot and pipe around pump are all hot.
However rads downstairs are cold, rads upstairs are hot.
I have flushed all rads downstairs with water to remove sludge etc. but still rads do not get hot. Have tried turning off upstairs rads to no avail. Have bled rads until hot water comes out but heat is not retained in rad.
Only advantage is spending most of time in bedroom??
any ideas help please
However rads downstairs are cold, rads upstairs are hot.
I have flushed all rads downstairs with water to remove sludge etc. but still rads do not get hot. Have tried turning off upstairs rads to no avail. Have bled rads until hot water comes out but heat is not retained in rad.
Only advantage is spending most of time in bedroom??
any ideas help please