Its a combi boiler system. I have tried bleeding all the heaters, at first the pipe leading up to the control valve was heating with a slight heat at top of radiator .Now it has no heat
2007-01-04 18:38:21 · 7 answers · asked by cadge 1 in Home & Garden ➔ Maintenance & Repairs
It's not an airlock, and unlikely to be a blockage. The first thing to check (it may sound stupid!) is to check that no one has turned the valve off. I suspect that you have thermostatic radiator valves on your radiators and that the valve in question is stuck, if the valve isn't turned off take the head completely off the valve, simply unscrew it from the top of the valve (no need to drain anything down). You will see a pin that goes into the valve, carefully with a set of pliers, move the pin up and down, this should solve the problem.
Hope this helps.
2007-01-04 23:22:41 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Probably a leaking valve, could be at either end of any radiator allowing air in. Could be the radiators need 'balancing' (one or more radiator may be drawing too much hot water from the system). I think this means let the system cool, remove the sleeves from the 'wrong' end valves (the ones you don't usually touch), close them all down, turn the boiler/control panel on and starting with the radiator nearest the boiler (that is - by service piped length, not necessarily by location) open the 'wrong' valve slowly until each radiator just draws heat. Work round the radiators in their order of distance from the boiler. Then use the other valves to regulate the heat as normal.
2007-01-04 18:58:45 · answer #2 · answered by dkska; 2 · 0⤊ 0⤋
First close all rads down except the problematic one by closing valve opposite end to stat. Never shut all rads down when running system. This will force all the water to this one. If rad is sludged up or has a blockage it will not heat up properly and you will need to take off the wall and flush out. With the system off shut valves down both ends of rad and take care as sludge stains. If it does get hot then you need to balance system. Open all other rad valves up 1/2 turn at a time until you have heat to all. A rule of thumb, the rads nearest the boiler will only need to be partially opened. This does however rely on the system being installed properly and the boiler being man enough for the number and size of rads. If the rads have been in a long time you may find you will have to have the system flushed in which case you will need a Corgi Engineer. Good luck.
2007-01-04 19:23:02 · answer #3 · answered by CJ W 2 · 0⤊ 0⤋
Is it the last radiator that the water gets too?
I have same prob - I have a combi & a downstairs radiator has never worked & I've tried bleeding it. When I had the boiler serviced the guy had a look at the radiator & got it too work temporarily but it didn't take long to go again. I think he moved a pin or something on the side
2007-01-04 18:42:34 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Assuming both radiator valves are OK. Try shutting some of the other rads down to get a good flow to this rad and bleed it again it can only be air or sludge stopping the flow.
2007-01-04 20:06:28 · answer #5 · answered by Daddybear 7 · 0⤊ 0⤋
This probably isn't the reason but radiators that get cold at the bottom and warm at the top don't need bleeding, they have sludge build up. You didn't mention how old this radiator is but thought I'd mention as a possibility. Is your radiator old?
2007-01-04 19:10:47 · answer #6 · answered by Robert SN 1 · 0⤊ 0⤋
Have you checked the valve at the other end of the rad? You can open and close with pliers after removing the plastic cap.
2007-01-04 18:41:55 · answer #7 · answered by Spiny Norman 7 · 0⤊ 0⤋