Inconsistent Heating Issue with Radiator: Heats Up After Venting, Then Cools Down

Hello,
I have this problem with the radiator this year:
Sometimes it heats up and sometimes not as it pleases. When I vent it gets hot and after 10 minutes it gets cold again.
I thought there was no flow so I turned off the valve up and down and drained all the water from the radiator. Then I turned the valve on the top to see if the water was flowing all the way down and in. I poured water into the radiator, it was hot and cold again after 10 minutes.
I live in a block of flats on the ground floor. Only one room problem.
Regards

Hello

I had a similar problem - solution - install the automatic air vent.

Hello,
put it in the place where the manual vent is? ie the upper right side of the radiator.
Will it drip water onto the floor?
Regards

Yes, install it in the upper corner of the radiator, for me it looks like this:


I have installed this air vent for over 2 years and it did not shed a drop of water.

I was buying a nice little radiator and something like this will stick out I will not say that it is a bit disfiguring
Overall, what's the problem? Is there air in the installation in a block of flats, or what? Because if the fault is not on my side, I will press the Housing Cooperative to fix the fault.
Regards

It's hard to say what the problem is, I don't know enough details to advise anything else. I suspect that the creative neighbors have come up with something with the central heating installation, or the radiator itself is faulty. Maybe it is actually worth reporting it to specialists from the cooperative for a good day, as it will not help, then install the vent.

What could the neighbors have found there?

A friend had such a problem, it was not caused by the radiator but by the pipe that led to it - there was such a hinge - the pipe went up, went horizontally and then went down to the radiator. In this case, the radiator is filled with water, but the pipe is not and there is no flow. There it helped to mount the "automat" on the tube at the top.

Buddy bubu87, if you upload photos of the radiator and the installation, it will make the diagnosis easier, because for now you can predict coffee grounds.

Screw in the return and bleed it properly.
It should start working. Notice that you have a negative drop in the power supply.

I vent and only water flows, not air ...

Try to bleed again at the valve.

And how is it venting at the valve?

It is vented with an air vent or by slightly unscrewing the union on the supply valve. You can put a pellet and unscrew it by gently dropping a little water on the return (so-called forcing circulation)
But here, buddy .. I don't know who founded this radiator for you, but I think Rysiek with a Czech ...
The reason for this is simple:
The power branch goes up, from what I see, the installations are in copper, so you can boldly lower it gently on the handles so that the power knob is equal or with a minimum slope towards the radiator, if you do not get such a height, lift the duplex radiator (from the vent side) max. .
that's the only solution in this matter. As long as Rysiek and Czech have screwed the vent properly .. {if you look from the top into the grille, it should be from the vent and the pipe, and from the valve side, it splits into both panels. I am an installer and I propose to close the topic because you will not do anything else. greetings

xXxXxMAXIMUSxXxXx wrote:

While Rysiek and Czesiek screwed the air vent well ..

And it can be screwed in wrongly.
"bubu87" report to administration, you pay them in the end.

gersik wrote:

xXxXxMAXIMUSxXxXx wrote:

While Rysiek and Czesiek screwed the air vent well ..

And it can be screwed in wrongly.
"bubu87" report to administration, you pay them in the end.

Yes you can. There are types of radiators where the page is important and there are the so-called universal types, I do not know what he has to have a look under the masking grille then it would be certain that I could bring him back with coffee grounds.
Ps, if you have a flat that has not been purchased for ownership and you have exchanged your heater yourself without writing a letter of consent to the cooperative or the community, you may still have a problem with this title.

Remove the thermostat head and check the position of the orifice on the valve. You have numbers there usually from 1-6. Set to 5-6. Also check that the lower valve is definitely open. Under its cap you have a mushroom that can be unscrewed with an Allen. It must be open, it is turned to the maximum (so that its face does not protrude beyond the valve because the plug may fall out).
Do not pour this water out of the radiator, it is enough to vent it with the valve. If, after such a check, the radiator continues to air out, the only solution will be the automatic air vent valve.

ok. problem solved.
you can close the topic.
thank you for your help