Downstairs rad won’t get hot

[Spen68]

I have 2 rads downstairs and boiler plus 13 rads on first floor upstairs. All work apart from the one downstairs, I have changed this rad and valves and bled all, still no joy, pipes are stone cold too. Think it’s on its own separate drop as other downstairs rad is hot.
Beginning to wonder if the pipes to this one have blockage and if a chemical flush would help?
Any suggestions appreciated.

 

[Deleted member 120897]

Has this ever worked? Could be both pipes feeding rad, eg x2 flow or x2 return

 

[Spen68]

Has this ever worked? Could be both pipes feeding rad, eg x2 flow or x2 return

 

[Spen68]

Hi Chris, it briefly got Luke warm last winter, now nothing.

 

[Deleted member 120897]

Hi Chris, it briefly got Luke warm last winter, now nothing.

If it got lukewarm last winter then I doubt it’s my previous comment. Might just need balancing.

 

[Spen68]

If it got lukewarm last winter then I doubt it’s my previous comment. Might just need balancing.

Yes, agree, I did try balancing but didn’t work, a bit puzzled tbh!

 

[Last Plumber]

Pull water through each side one at a time until hot. Once that's done, re-open both sides and see if it made a difference.

 

[Spen68]

Pull water through each side one at a time until hot. Once that's done, re-open both sides and see if it made a difference.

Thanks for reply, do you mean open valves on rad one at a time and drain off whilst running system?

 

[Last Plumber]

Thanks for reply, do you mean open valves on rad one at a time and drain off whilst running system?

You need to close one valve and run the other whilst the system is hot. Then once it is hot water flowing, close it and repeat with the other. You can use a drain tap if it has one or disconnect each valve (into bucket) or disconnect the top plug and connect a hose.
If this is a sealed system you will need to ensure it doesn't drop the pressure whilst you do it or you'll give yourself other problems. If it is open vent you should be OK.

Doing this will pull any air through and prove there's no blockage. Once the water is hot both sides, re-connect and open both. If it doesn't work, I would be looking at balancing again (you said you'd tried it).

 

[Spen68]

Pull water through each side one at a time until hot. Once that's done, re-open both sides and see if it made a difference.

You need to close one valve and run the other whilst the system is hot. Then once it is hot water flowing, close it and repeat with the other. You can use a drain tap if it has one or disconnect each valve (into bucket) or disconnect the top plug and connect a hose.
If this is a sealed system you will need to ensure it doesn't drop the pressure whilst you do it or you'll give yourself other problems. If it is open vent you should be OK.

Doing this will pull any air through and prove there's no blockage. Once the water is hot both sides, re-connect and open both. If it doesn't work, I would be looking at balancing again (you said you'd tried it).

 

[Spen68]

Ok thanks, I’m off working for a few days so will try this later in week. Worth a shot!