1 radiator doesnt work.

holymonk

holymonk

holymonk

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12 Oct 2011
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1,490
Hi,

I am in a PBF, central heating.... All the radiators work except on in the spare room.

I have tried turning a the thermostat on the radiator up - nothing.

I have turned the flattish looking metal bit at the end of the radiator (valve?) nothing.

I notice that the pipe leading to the radiator is also cold..

Any ideas?
 
my radiator in the kitchen does not work , never worked since I moved in.


had someone out to fix the heating the other day and he was desperately trying to get it to work when I noticed and told him it never worked since I lived here and I would not use it anyway.

it's probably got it's valve blocked up with crap
 
Thing is, the radiator (around the valve area) looks different to the one I believe (im a noob) that can be bled?

So the one in the hall has a key thing, the one in the spare room doesnt.

Are some radiators non bleedable?
 
holymonk said:
Thing is, the radiator (around the valve area) looks different to the one I believe (im a noob) that can be bled?

So the one in the hall has a key thing, the one in the spare room doesnt.

Are some radiators non bleedable?
Click to expand...

afaik they all should be but it's probably something else if it does not get hot at all or even the pipe to it like mine.

I tried bleeding it cold water came out , it still wouldn't get hot and it's a radiator directly outside the boiler cupboard so most likely the last/first on in a loop which makes it even weirder
 
arknor said:
afaik they all should be but it's probably something else if it does not get hot at all or even the pipe to it like mine.

I tried bleeding it cold water came out , it still wouldn't get hot and it's a radiator directly outside the boiler cupboard so most likely the last/first on in a loop which makes it even weirder
Click to expand...

I have the same issue with one of my radiators. Bled it, cold water came out... heating is on full whack and the pipes are cold.

Need to get around to having a proper look, but where?
 
Does the radiator have a TRV (Thermostatic Rad. Valve)?

It may be jammed, take the head off (plastic part you turn). This will require no tools as unscrews by hand.

Now, you'll see a little upright pin. Take note the length of pin. Give the pin a little sharp tap with a small hammer. Is the pin now longer? If so it was stuck in and you've likely just cured the problem.
 
Last edited:
Tesla said:
Does the radiator have a TRV (Thermostatic Rad. Valve)?

It may be jammed, take the head off (plastic part you turn). This will require no tools as unscrews by hand.

Now, you'll see a little upright pin. Take note the length of pin. Give the pin a little sharp tap with a small hammer. Is the pin now longer? If so it was stuck in and you've likely just cured the problem.
Click to expand...

In my situation I've taken caps on and opened the valves using a pair of pliers and made sure the valve was fully open.
 
Air is bled out of the top of a radiator or towel rail, so the little pin will be up top somewhere. Some are easy to spot, others hide at the back and even under little dust caps. Most just require a standard radiator key to use them. Just loosen them till water drips out. Job done. Dont remove the pin! If you have a sealed system (combi) then check the system pressure and top up as required using the filling tap.

Hot or cold water makes no difference to venting a radiator.

Having the pump running on a very old system can stop the rad filling, do it with the system OFF.

If the rad is full of water and still cold then you most likely have a faulty valve or sludged up pipework. If one of the valves is thermostatic then try removing the head at the body (usually a knurled nut) and check to see if the pin underneath (in the body) is stuck down. If it is then tap it gently with something metal and hope it pops back up. The little pin when pressed should spring back up 5mm or so.

Mick
 
JAzz said:
If that doesn't work, turn the rest of the radiators off and then bleed the one giving you issues.
Click to expand...

Do this first. With all the other radiators off the pressure should dislodge the air to the top of a radiator and allow the water to circulate.

One of my radiators wasn't working yesterday after months of inactivity and the above sorted it.
 
Sorted it.
Tightened bother valves then opened them again, got nice and hot quickly. Looks like the valves were a bit rubbish.
 
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