is it the pump Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[r1mad]

hi radiators upstairs are warm not red hot though and down stairs are cooler or cold the pump sounds like its running but if memory serve s me it is not as noisy could it be the pump is slowing down so it doesnt have the power to feed all



thanx

[r1mad]

came in tonite and the radiators that were cold this am were now hot and 1 upstairs was cold so bled them all and everything is hot could it just have been an air lock as quite a bit of air came out

[r1mad]

i know sounds like a comedy sketch but after a while turned off heating and on again now the down stairs are cold again and the upstairs are hot any ideas

[htg engineer]

sounds like an intermittent fault with pump - the impeller may be loose or could be getting stuck - replace pump and all should be fine.

[r1mad]

fitted new pump exactly the same as come off but still have problem of that if hw and ch are on together a few of downstairs radiators are cool or cold but if i turn ch off all rads get hot so ?

[r1mad]

fitted new pump exactly the same as come off but still have problem of that if hw and ch are on together a few of downstairs radiators are cool or cold but if i turn ch off all rads get hot so