Downstairs radiators not heating .....

[dav]

😕I wonder if anyone can advise me on a problem that has just started to occur with my radiators , all of a sudden the other day the downstairs radiators suddenly stopped heating , the upstairs ones appear to heating fine but the downstairs ones are not , i have tried bleeding them , drainling water from them . still no joy , on inspecting the pump i noticed it was rather hot , but it is running , i think its hotter than normal due to the fact the room thermostat is downstairs were the radiators are not heating so the pump is working harder , ive even inspected the three port divertor valve , the horizontal pipes leading from the valve appear to be hot so i guessed the valve is operating ok ? , as this tells me there is hot water going to the rads and the water , is this correct ?
Can anyone give me any ideas what to look for as the house is starting to get colder and with my daughter in the hse this is something i could do without .....Many thanks in advance ......Cheers

 

[sonray ltd]

have you tried altering the speed on the pump ?
have you tried bleeding the pump ?
a pump can make a noise but not be circulating the water fully or at all.

i would opt for a pump problem.

the upstairs rads will still get hot as heat rises.

 

[dav]

Thanks for the quick reply mate ...
I have altered the speed of the pump . which makes a different sound but still doesnt cure the problem , the pump at the minute is on speed 3 . i have also tried bleeding the pump, which appeared to let a little air out but again didnt cure it , its a nightmare .....

 

[sonray ltd]

did you bleed it not running ?

 

[dav]

I never mate the pump was running when i b;ed it . does this make a difference like ?
Again thanks for taking the time in helping me ......

 

[sonray ltd]

yes turn system off then bleed pump.
turn system on then re try if this still fails we go to next step.

 

[dav]

Just tried that step but nothing came out of it ?
I am off to sit my 17 th edition exam now mate , but thanks for your help all the same , i will be back at 5 ish so hope the next step will fix it ......cheers

 

[sonray ltd]

good luck.

 

[dav]

Well passed that exam . thank god , haha
, so back to the heating . still no joy , unfortunatly , could it be the divertor valve at fault , or wouldnt the upstairs rads heat if that was faulty ? thanks

 

[Deleted member 2053]

Try turning off the hot water at the programmer (assuming it is a pumped primary) and all of the radiators apart from one of those that is not getting hot and see what happens.

 

[dav]

On our syatem its hot water and heating at the same time . i did turn all the rads off upstairs , hoping this would heat the downstairs ones up but the feeds monly got warm and the rads didnt heat properly....Thanks , but still no further forward .....

 

[Deleted member 2053]

Time to have a look inside the pump I think.

 

[dav]

Cheers for the help lads , its turned out to be the pump . replaced it now sorted ,,,,again thanks alot...