Help please, Radiators won't get warm

Astrozombies

After 3 days it's sorted. Mate called and helped me balance all the radiators. Took us about 3 hours but temp in here has gone from 7 degrees at 3pm to 21 now.

Jeepers_Creepers

Astrozombies said:

Drained the system down to pity these on, opened the system to check for leaks then turned rads on.
Yes, these can go on any side of the radiator.

Everything following freely on the first one.

So, each valve on that first rad, when opened up, gives a good solid flow of water? Blimey.

If the rad is still off, can you let each valve run for a good 15-20 seconds? Does the flow rate stay pretty solid and even? If so, it surely cannot be an airlock in there. 

I'm struggling to come up with a cause, I'm afraid, Astro. :-(

Homer_home

Jeepers_Creepers said:

Astrozombies said:

Drained the system down to pity these on, opened the system to check for leaks then turned rads on.
Yes, these can go on any side of the radiator.

Everything following freely on the first one.

So, each valve on that first rad, when opened up, gives a good solid flow of water? Blimey.

If the rad is still off, can you let each valve run for a good 15-20 seconds? Does the flow rate stay pretty solid and even? If so, it surely cannot be an airlock in there. 

I'm struggling to come up with a cause, I'm afraid, Astro. :-(

Erm the post before yours says he fixed it by balancing the rads...... 

gamston

why were the 2 new radiators not getting hot when all the others were turned off ? but all works now they are balanced, some kind of air block ?

Jeepers_Creepers

Homer_home said:

Jeepers_Creepers said:

Astrozombies said:

Drained the system down to pity these on, opened the system to check for leaks then turned rads on.
Yes, these can go on any side of the radiator.

Everything following freely on the first one.

So, each valve on that first rad, when opened up, gives a good solid flow of water? Blimey.

If the rad is still off, can you let each valve run for a good 15-20 seconds? Does the flow rate stay pretty solid and even? If so, it surely cannot be an airlock in there. 

I'm struggling to come up with a cause, I'm afraid, Astro. :-(

Erm the post before yours says he fixed it by balancing the rads...... 

I SWEAR that post wasn't there when I posted :-(

:-)

Jeepers_Creepers

gamston said:

why were the 2 new radiators not getting hot when all the others were turned off ? but all works now they are balanced, some kind of air block ?

Summat doesn't make sense. Air block is, I guess, the most likely option.

Pleased it's now sorted tho'. 

Astrozombies

Yeah, I turned all of except the end one of the new ones, nothing, turned on the other, nothing... Opened the drain tap and got rid of some water so messed about turning pump on and off and left all bleed screws open etc... Took a while and lots of meeting about then suddenly end one got red hot so from then it was an easy job to just balance them all.