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How to Fix One Radiator Not Working – Plumbing Tips


– [Announcer] Plumberparts.co.uk,
honest reviews and advice. Sponsored by heatandplumb.com. Hi, and welcome to another
plumberparts.co.uk video. Today, I’m going to give you a
quick bit of advice about how to get your radiator working
if only one’s working. Now I’ve seen a few other
videos on the Internet about how to do this, and
some of them are plain wrong, and some of them could
actually cause leaks in your house if you do it wrong. Here’s the radiator in question. All the other rads in the
house are burning hot, the boiler’s on, the pump’s running, and the thermostat in the
room’s calling for heat. But this one radiator
here isn’t getting hot. We feel these pipes here. There’s no heat coming down here at all, and as I said, all the other
radiators are hot in the house. So the first thing we do is check that the lock shield is open. All you need to do is
remove the lock shield cap. You’ll find the lock
shield valve bit here. Get a set of adjustables on there. Open that fully up. Turn that all the way
you can anti-clockwise. Okay, keep going and keep going. Now you never know, now you might find that you’ve got heat
coming into the radiator. To get the earliest
affirmative answers to whether there’s heat going into the radiator, instead of feeling the
radiator itself at the bottom or the top, feel the
two pipes going to it. One will be a flow pipe,
and one’ll be a return pipe, and if now you’ve opened
up your lock shield, and you feel one of these
two pipes getting warm, then you know you’re getting flow. However, that might not
have solved your problem. You could still have air in the radiators. The symptoms of air in your radiators are quite simple to describe. If you already have a hot flow and return going to the radiator, if
you felt down the radiator, it should be warm at the bottom, and at the top it would be cold. This is always a sign of
air being in the rads. But before you get mental
trying to bleed all the air out of the radiators, I strongly recommend you turn the boiler and the pump off. Anyway, here’s how you bleed a rad. Right, so here’s how
to bleed your radiator. Your boiler and your pump are turned off. Both radiator valves are open. Even though we haven’t
looked at the TRV yet, so that could be stuck shut. We’ll look at that in a minute. Just get a little bit of cloth, get your radiator key in there. Open that. Fortunately, you can see
we’ve got water there already. Just let that run for a few seconds. That’s great. Now usually when there’s air in there, obviously you have a lot of air coming out before you get to water. Obviously, if the radiator does have air in the top of it, you
will get air coming out. You’ll be able to hear it really easily. It’ll be a nice, slight hiss,
and you can control easily the rate at which it
comes out using this key. As soon as you get a
bit of water come out, just tighten it up,
wipe up any excess water that might have spilled on the floor, or something like that. And then you should feel the radiator at the top getting nice and hot. The next problem you can have
is the fact that your TRV, or the control head for the
radiator, is stuck shut. This is where I’ve seen
a few of the other videos on the Internet telling you how to do this sort of thing have gone wrong. Now, let’s just go over it very slowly, and if you follow our
instructions, you should be able to get it working just fine again. If not, we’ll give you a quick
guide on how to change a TRV. So here’s the thermostatic
radiator valve in question. First thing you need to do is make sure it’s fully turned on. So at the moment, it’s on
setting number five out of five. Next, you have to be able
to remove the TRV head. Now there’s a few
different ways to do this. This one here is just a screw-on collar. Some of the other ones, like
by manufacturers like Danfoss have a black plastic
lug that you have to pop a screwdriver into, pop
that out, and then you just quarter-turn twist it, and it’ll lift off. But this one’s a collar-screw one. You put that there, and that means there we can reveal the head here. Now this one I know works. The way you can figure that one out is you just press this pin down like that. Some of them, the pin will be stuck down. On this particular type,
the best way to do this is to, while it’s stuck
down, just pressing it a little bit and see
if that’ll bring it up. The best way to deal with
these is to be gentle. Don’t hit them with a hammer. Now this particular model
won’t have that problem but if you got a tradition pin-type TRV, if you hit it with a hammer,
often the pin will just fly out and you’ll have a lovely
fountain of water just come out. The best way to deal with the pin types, is to get a very small
set of long-nosed pliers. This is a set of long-nosed pliers, and what you do is you grip the pin itself and you just wiggle it upwards. Just pull it out yourself, and pull it up, and that’ll get it working with any luck. Sometimes you’ll find
once you’ve got it free, you can push back down the pin,
and it will stay stuck down. At that point, you’re probably
going to be looking at getting a new TRV for
that particular radiator. This particular type
here, fortunately because we don’t have that problem with it being a traditional-type
pin, the best way I find to deal with these, would
be to get a large-ish, if it’s stuck down, get
a large bit like that, and then to slightly tap it. Just to shock it. That’s all you need to do. You’re not trying to bash the
hell out of this so it moves. All you need to do is shock the tension out of what’s holding it in place. And then it should pop up
and then if you’ve bled the radiator of air,
you’ve undone the TRV, and the lock shield,
you’ve got a great flow. You should then have a hot radiator. I hope you found that video
helpful in telling you how to get your one radiator
from working again. If you find that you’ve
got two or three radiators on a long run that aren’t
working, the potential problem for this system could be
that it is not balanced. We are going to do a video
for balancing radiators, and if you check our channel, or you if check our related videos, you should find it there. If you have any more
problems, you can contact us, or visit our website
at plumberparts.co.uk. Thanks ever so much for
watching, and I’ll see you soon. Bye bye. Plumberparts.co.uk,
honest reviews and advice. Sponsored by heatandplumb.com

Bernard Jenkins

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