Why is 1 of my radiators cold when the rest are hot. i have bled all of them.?
Question:i have even shut off all remaining radiators thus i have only the cold radiaor in the loop and still it cold. i am not having to top up the boiler either?? confused i am?
Answers:
there may be sediment in it.
is it warm at all, sometimes if it is blocked you get warm up top, but not down the bottom.
turn it off and both sides, drain it disconnecting the two valves, using a washing up bowl. carefully!!
lift off brackets, carry outside, flush it.
reconnect.
add some anti corrosion fluid to your system, via the central heating tank, in attic (not your water tank!!)
Is it turned on?
For some reason the water is not getting through, is it an old system full of sludge that has collected in this one rad.
The valve to the radiator could be stuck. Try a gentle tap with a hammer.
this may sound daft ..but i rekon that it is not on ..try doing the reverse to what you did to the others to turn them off...!¬!
maybe you have a blockage, but silly question. Have you turned it on ?
Try turning the rad valve on and off a few times hard, may be faulty and sticking.
Have you checked both valves are open at the base of the radiator if not 1 of the valves could have seazed shut and snaped off inside (new valve reqired in this case)
Is this a steam radiator
If so, it could be due to a number of reasons. First, check the water level as indicated in the gauge glass. If the water level is too low, turn the fill valve on to put more water into the boiler.
Place a bucket beneath the system drain tube, then open the valve on the low-water cutoff. Drain water into the bucket until it runs clear, then close the valve. This should be done at least twice each year during the heating season.
Check the setting on the pressure control. It should be set to a low level (check with a steam heating contractor to learn the suitable settings for your system).
Does it make a whistle noise? If so, the radiator may pitch to one side. Take a level and determine if the radiator is level. If it isn't, it will not work properly.
thermostatic valves are prone to stick...
Sounds like the valve is stuck off to me. Other than that, if it's the last one before the draincock, ie. the lowest rad of the system, it may be bunged up with muck.
are the pipes to and from the rad warm? it sounds like a blockage. if the system is old the water will be black as ink and a sort of fungus forms, like scraps of torn up paper so investigate with caution. does the rad bleed up as quickly as the others? if so at least the blockage is only on one side. is there a point where one side is hot and one side cold?find that point and you may have the blockage
SOUNDS TO ME LIKE THE PIN ON THE TRV IS STUCK TAKE OFF THE TRV HEAD AND PULL THE PIN OUT WITH PLIERS
Maybe there is a switch somewhere for a pump. all mine work upstairs, but I need to turn a pump on to heat downstairs. If no pump, then maybe the radiator is full of sludge.
it's clogged
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