Heating issues...

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Hey.

House has 4 radiators upstairs, all get hot. 3 downstairs, only 1 gets hot.

This is with the thermostat set to max and boiler set to max.

When I press the button to turn the heating off, the 2 that don't get hot are suddenly heating up. All the pipes get toasty and it's all good.

However... Ideally I want them on when I press the heating on Laughing

Anyone have any ideas... I partly think bleeding the radiator would help or at least confirm it's not that, but the radiator bleed screw is.... Not really square Rolling Eyes

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

Turn off all the radiators other than one of the ones that isn't getting hot. See if it gets hot (it ought to). Repeat this process with the other two.

Now go round and balance them. Start with them off then open the valve a little on the one nearest the boiler, just enough for it to get hot. Then move on to the next nearest. You'll have to open the valve progressively more on each one as you go round.
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P. · Red Rocket Joined: 14 Feb 2008 Karma :

Erm... By turn off...?

I'll add some photos. All my radiators have nonadjustable ends.

https://imgur.com/vk0zXxL

I have no temperature adjuster either. It's all done centrally on the thermostat. Homo as shit, but is what it is.

Bikeless · World Chat Champion Joined: 27 Jun 2008 Karma :

bugeye_bob · World Chat Champion Joined: 05 Sep 2013 Karma :

Are you sure all the radiators are working of the CH side of the Boiler?
I recently found a system when 8 or 9 were off the CH side of the boiler, and were controlled by a 2 way valve/stat, but 2 in the lounge were fed from the HW side, not on the 2 way valve or stat,
if you turn the CH off, the spare hot water may be heating the other rads, hope that make sense, as I had never seen anything like it before,
But a Plumber who had to come and swap the 2 way valve had.

J4mes · World Chat Champion Joined: 18 Mar 2011 Karma :

andys675 · World Chat Champion Joined: 08 Feb 2007 Karma :

I followed a vid on youtube because of the same problem, bled all the radiators, made sure all of the valves weren't stuck on the inlet side and balanced the outlets so the hot water didn't return too quickly, the hardest part was realising there was a stupid cover on the inlets that needed removing first. Was surprised how easy it was and got more or less instant results
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P. · Red Rocket Joined: 14 Feb 2008 Karma :

doggone · World Chat Champion Joined: 20 May 2004 Karma :

You can leave the cool ones as they are, reduce the flow to the ones getting hot.
Here we have solid fuel based system and basically the first one in the line you only have that valve open a quarter turn or the later ones don't get warm.
With the pump going you will probably be able to hear when you have stopped it or allowed a bit through.

P. · Red Rocket Joined: 14 Feb 2008 Karma :

I'll do that when I arrive. Cheers guys.

Freddyfruitba... · World Chat Champion Joined: 20 May 2016 Karma :

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Well I seem to now have functioning radiators. Did as explained by stinkwheel and all, then followed up with fruitbats link and on absolutely full temp, which is like 30, every radiator is showing ~2 degrees of eachother at top and bottom, bar one. The small bedroom, but that's got a 3/4 hot radiator, top right near bleed screw is a bit cold, I'll give it a bleed.

Thanks all, karma when I have access to something that's not my phone.