Rads not getting hot!

[Riley]

Did you check the pump?could be a broken impeller or just not turning freely/at all.

 

[jase158]

Pretty sure it is pump, possibly wiring issue!!

 

[Nimit]

Didn't check the pump at the time after as airlock issue was resolved and all rads were getting hot. Guess I should take a spare pump with me and try that.

 

[jase158]

usually is pump as gravity will heat upstairs rads, but not downstairs, unless its air getting in from vent (did u turn pump down after you finished the work?)

 

[Nimit]

Left the pump settings as they were from before.

Thanks for your help btw.

 

[Neil K]

Only reading this thread in full now. Yes airlock your original problem, now its the pump

 

[jase158]

Does sound like pump but i have had a couple systems that work fine and about 2 weeks later they hear a loud gushing and then half the rads don't work, usually after power flushing.

push the air out and its sorted!!

 

[Nimit]

Went to customers today. Changed pump and everything worked fine. Thanks all for the advice.