Why is downstairs radiator not working?

[veedee]

New boiler was installed about 6 months.

Following installation, the boiler has been mainly switched off due to renovation etc

During the renovation all the rads were removed. Then refitted and inhibitor added to system

All the rads upstairs work, but the single one downstairs does not

I've bled the system, shut off the upstairs rads (lockshield and trvs) to force heat downstairs. Still nothing.

What else could it be? The pump?

If it helps, my boiler is outside

 

[ericmark]

Have you shut off lock shield and opened TRV and bleed then open lock shield and close TRV and bleed so both supply and return both bleed?

 

[oldbuffer]

If the downstairs one is fed by dropped pipes from above, radiator could be airlocked. If so, there should be bleed points on each of flow and return drops, use these to get rid of the air.

 

[veedee]

Have you shut off lock shield and opened TRV and bleed then open lock shield and close TRV and bleed so both supply and return both bleed?

Tried this and had no joy unfortunately

If the downstairs one is fed by dropped pipes from above, radiator could be airlocked. If so, there should be bleed points on each of flow and return drops, use these to get rid of the air.

I'm hoping that this solves the issue

Will give this a shot tomorrow. Thanks

 

[terryplumb]

Is the problem rad the ONLY radiator
Downstairs ,or do you mean it's the only one downstairs that doesn't heat and the others do ?
Was it working before refurb??

 

[veedee]

There is one radiator downstairs within the property

This downstairs radiator is the problem rad as it does not heat up at all

All of the upstairs rads (two in total) are fully operational

I'm 90% confident that it worked prior to the renovation.

 

[terryplumb]

Check the pump isn't siezed up ,due to lack of activity.

 

[veedee]

Check the pump isn't siezed up ,due to lack of activity.

I felt the pump and i could feel a faint vibration. I am not really sure whether that is normal or not

The pump i have has a screw inside. I have a pic of this in my opening post

I stuck a screwdriver in there and gave it turn and push. is there anything else i can do?

 

[veedee]

If the downstairs one is fed by dropped pipes from above, radiator could be airlocked. If so, there should be bleed points on each of flow and return drops, use these to get rid of the air.

My radiator has a bleed valve on one end and a plug on the other end

However, to try amd remove air i followed this guys video and the rad is still not working

I then drained down the system and one pipe got warm but the other is ice cold.

Does anyone have any suggestions?

 

[Deleted member 267285]

That’s an erp pump, don’t think you can get to those screws. X2 flow pipes or return pipes plumbed in by accident?

 

[Deleted member 267285]

Post photo of affected radiator?

 

[veedee]

Post photo of affected radiator?

Just uploaded pics in previous post

 

[terryplumb]

Does the problem rad have a thermostatic radiator valve ( TRV) ?
It may be stuck closed.

 

[veedee]

Does the problem rad have a thermostatic radiator valve ( TRV) ?
It may be stuck closed.

I don't think that it is that

As the trv is new. I removed the head to make sure that it is not stuck

 

[terryplumb]

I see in pics that you do have a TRV ,press down on the pin to see if it moves freely up and down.