New downstairs radiators fitted but now upstairs bedroom radiator does not heat up

[BillyThePigeon]

Recently fitted 2 x downstairs radiators which are working fine, only problem is 1 of the 3 radiators upstairs no longer heats up at all.

Tried bleeding all rads and they're full of water but just 1 isn't heating and neither are the pipes going into it.

It's a combi boiler fitted on the 1st floor.

Any help appreciated, Thanks!

 

[Harry Bloomfield]

It's either an airlock, or really badly balanced.

Assuming airlock - Turn all radiators off, except the 1 cold one upstairs, run the pump, then bleed it. If that doesn't help, report back.

 

[gas112]

Check the valves either side are actually turned on and open if it has a trv check the pin is not stuck down

 

[BillyThePigeon]

Hi, thanks for the reply.

I've switched all radiators off at the thermostatic valve apart from the faulty one and switched the heating back on full.

The boiler makes a noise like water swooshing round but the flame doesn't kick in at all. I opened up the radiator valves and the flame lit back up again consistently.

The faulty radiator still isn't heating up at all.

Any ideas on this?

 

[BillyThePigeon]

I've checked the valves and they're both fully open

 

[BillyThePigeon]

The pipes going to the valves also aren't heating up

 

[Harry Bloomfield]

Who installed the new radiators?

It seems that either one of the pipes must be completely blocked, or there is some other reason for no circulation.