Radiators HOT upstairs, COLD Downstairs

leedrummond · 3 Apr 2008

I have just fitted a towel rail in the bathroom upstairs, drained the system to do that, and now filled system back up after doing so.

as subject the downstairs radiators are all cold and the upstairs are all hot.

I have bled all radiators downstairs till water comes out, and same upstairs till water comes out.

What do i do from here?

pump is operating fine on all 3 of its speeds, but does sound like air in system as it makes a fizzing sound every few seconds, and water isnt constant when i unscrew the screw on front of pump

leedrummond · 3 Apr 2008

after turning ones off upstairs and forcing heat downstairs that did work however heat didnt get to the radiator that i have bene using to connect hose pipe to when i originally drained the system. that radiator at the bottom of the stars stayed cold.

martyc · 3 Apr 2008

U may have an airlock...turn off all the rads..then turn one on at a time to force water thru.
Then turn off boiler and bleed that rad...turn it off and move to next.
(just do it to the rads that arent heating and it may solve the prob)
Other than that it may be your pump but i guess the problem started after u fitted the towel rail
marty

leedrummond · 4 Apr 2008

cheers marty c i shall try that when i finish work today.

when i turned the radiators of upstairs it did make all radiators downstairs go hot, apart from the one i used to drain system, that stayed cold, but theres wate rin it when i bled it.

will try ur method later and let u know what happens

i think i need to drain the system again anyway as theres a slight leak on the valve of the new radiator upstairs, if this is the case can somebody give me the best method on how to refil my system without getting an airlock ?

leedrummond · 5 Apr 2008

ok, after bleeding the system i have all air out of the system, and its running how it was before iadded the towel rail

id like the downstairs radiators to get as hot as the ones upstairs, unfortunatley ive tired and tried but nothingi do can achieve this.

turning the pump onto setting 3 just makes hot water to fill into the header tank,.

can i add anything into my system to allow the water to heat downstairs radiators if there is crap in the radiators?

kevplumb · 5 Apr 2008

try balancing the system

leedrummond · 5 Apr 2008

cheers kev plumb, i have just turned all the radiators upstairs that are hot, down.
will see if that forces some more circulation downstairs,

threethirtydc · 5 Apr 2008

OK What system are you running.Y.S.OR W PLAN?
DID YOU OPEN DIV VALVES TO MANUAL OR LEFT THEM ON AUTO DURING DRAIN DOWN?

kevplumb · 5 Apr 2008

c plan +

leedrummond · 5 Apr 2008

i dont know what system i have. It has a valve that has a cover on it that has philips head on top of it. Then other side it has the + and - valve

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Radiators HOT upstairs, COLD Downstairs

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