our lounge rad is warm (but not hot) at the top left side, cool at bottom left side and cold at top & bottom on right side. Have tried to bleed it but seems OK. It's a replacement rad fitted about 3 years ago and has a thermostatic valve fitted. The pipe coming out of the floor (and into the rad) on right hand side is really hot but the pipe going into the floor on the left is stone cold. All other rads in the house are really hot. Any ideas?
2006-11-27 23:01:49 · 12 answers · asked by jackie b 1 in Home & Garden ➔ Maintenance & Repairs
On your rad, on the opposite end to the thermostatic valve there is a valve with a cap on it, called a lockshield valve. Remove the cap, turn the spindle about 1/2 turn anticlockwise. Each radiator has a lockshield valve, these are used to balance the flow through each radiator, to ensure they all get flow, maybe some open 1/2 turn, others 1 turn. Be aware that if you open the lockshield wide on your problem rad, other radiators may be starved of flow and go cold.If you think of each rad as a rung on a ladder, with the valves on each end, you can see that its perfectly possible to close another rad down a bit, and your culprit will get warm...maybe it is being starved by another rad?
2006-11-28 00:26:41 · answer #1 · answered by johncob 5 · 0⤊ 0⤋
The problem is probally sludge. You need to turn off/close the valves at each end, the hand valve, and the lock shield at the other end. Drain the radiator in a basin after slackening the large nuts which hold the valve to the radiator. Remove the radiator and flush through with a hose to remove the sludge. When clear, reinstall radiator using PTFE tape to the screwed joints, open valves and check for leaks, tighten if leaking. You can also purchase a flushing additive from a plumbers merchant, which will help and clear the whole system.
2006-11-27 23:41:43 · answer #2 · answered by lightninga65 1 · 0⤊ 0⤋
Probably the thermostatic valve is stuck closed, remove the head and push the pin in and out a few times to release it. If no improvement then it may be sludge, but doubtfull since other rads are working ok.
2006-11-28 02:06:14 · answer #3 · answered by jayktee96 7 · 0⤊ 0⤋
Please ignore all this other crap from people who don't know what they are talking about, the problem is and i quote " you said that the rad, had been replaced " all you need to do is on the left hand valve pull off the white plastic cap and with a pair of pliers or grips, open the little square top a few turns anticlockwise and instantly your whole rad. will be hot.
2006-11-27 23:50:16 · answer #4 · answered by Sparky 3 · 0⤊ 0⤋
tap the valves(bit between rad & pipe from floor) with a hammer
2006-11-28 07:34:18 · answer #5 · answered by Gregor P 1 · 0⤊ 0⤋
You don't say if it's steam heat or hot water? If steam on a 2 pipe system it could be the steam trap on the left side going out is not opening.
2006-11-27 23:18:32 · answer #6 · answered by glenn f 1 · 0⤊ 0⤋
If you have tried to bleed off air than i would check if you have zoned heat. There are valves at your boiler that open to a perticular zone in your house that allowes hot water to flow to that area. if this valve isn't opening you get no heat but that that comes from hot pipe ajoining that pipe that gets it hot water from.
2006-11-27 23:54:13 · answer #7 · answered by shaff 2 · 0⤊ 0⤋
Agreed...it probably has air in it; bleed the air out and the hot water should flow through fine.
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2006-11-27 23:04:33 · answer #8 · answered by Rusting 4 · 0⤊ 0⤋
Probably the thermostatic valve is not working or needs to be adjusted to allow more flow.
If it is adjustable then try to turn it up.
2006-11-27 23:23:30 · answer #9 · answered by Anonymous · 0⤊ 0⤋
probably just needs bled,on the top at one side there should be a square shaped nut,to be loosened with a bleed key to release air
2006-11-27 23:03:12 · answer #10 · answered by del 4 · 1⤊ 0⤋