Hello, unfortunately, I noticed the lack of a knob on the radiator, so I can not regulate the temperature on it and it is turned to the max. I would like to ask what I can do in such a situation. Do I have to replace the entire valve (rather impossible due to the heating season), or maybe a head...

A thermostatic head can be installed. Take some photos, preferably with a ruler, and go with the photos to the store that sells these things. The seller will help you choose the right part. By the way, it doesn't look like anything broken there, it's just unscrewed there. Sometimes you can open and close the valve using such a plastic cap:

This is good advice. Measure the thread diameters (it can be, for example, M28, 30) and take photos from the bottom and top (the markings on the valve body are important - designation of the make / type of the head) and chase to the store (s).

Since replacing a compatible valve is not an option, I suggest adjusting some pliers. I know that the first better pliers may not grip, but it will definitely grab some smaller serrated Knipex key.

Buddy Rebal, with a valve like in the picture, you can pick your nose with pliers. I recommend that you get to know how such a valve works and only then give advice.

And what do you want to regulate with pliers? This pin is pushed back by an internal spring. So if you press him down with the pliers, he'll go back to the same place.

This is the old Danfoss RTD. there is a typical M30x1.5 thread The first and best thermostatic head from the store will fit. The valve closes by pressing this protruding pin, it can be hard to walk when there was no head, you have to start it because the thermostat will not regulate.

Broken knob on the heater

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#1 16004415 18 Oct 2016 23:48

grabos92 grabos92

Level 2

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Post #1
16004415 18 Oct 2016 23:48

Hello,

unfortunately, I noticed the lack of a knob on the radiator, so I can not regulate the temperature on it and it is turned to the max. I would like to ask what I can do in such a situation. Do I have to replace the entire valve (rather impossible due to the heating season), or maybe a head or any knob can be mounted on it to reduce heat and, at the same time, bills.

Thank you in advance for your help and best regards.
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#2 16004427 18 Oct 2016 23:57

sanfran sanfran

Network and Internet specialist

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Post #2
16004427 18 Oct 2016 23:57

A thermostatic head can be installed.
Take some photos, preferably with a ruler, and go with the photos to the store that sells these things. The seller will help you choose the right part.
By the way, it doesn't look like anything broken there, it's just unscrewed there.
Sometimes you can open and close the valve using such a plastic cap:
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#3 16006036 19 Oct 2016 21:03

andrzej lukaszewicz andrzej lukaszewicz

Level 41

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Post #3
16006036 19 Oct 2016 21:03

sanfran wrote:
Take some photos, preferably with a ruler, and go with the photos to the store that sells these things. The seller will help you choose the right part.

This is good advice. Measure the thread diameters (it can be, for example, M28, 30) and take photos from the bottom and top (the markings on the valve body are important - designation of the make / type of the head) and chase to the store (s).
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#4 16017881 25 Oct 2016 18:38

Rebal Rebal

Level 10

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Post #4
16017881 25 Oct 2016 18:38

grabos92 wrote:

unfortunately, I noticed the lack of a knob next to the radiator, so I cannot regulate the temperature on it

Since replacing a compatible valve is not an option, I suggest adjusting some pliers. I know that the first better pliers may not grip, but it will definitely grab some smaller serrated Knipex key.

Moderated By ROBSON33:

Please don't write nonsense. If a colleague does not know how a given valve is built, please do not comment.
I will reward the next such statement with a Warning.
#5 16018660 25 Oct 2016 22:34

sanfran sanfran

Network and Internet specialist

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Post #5
16018660 25 Oct 2016 22:34

Buddy Rebal, with a valve like in the picture, you can pick your nose with pliers. I recommend that you get to know how such a valve works and only then give advice.
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#6 16018669 25 Oct 2016 22:37

Anonymous Anonymous

Anonymous

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Post #6
16018669 25 Oct 2016 22:37

And what do you want to regulate with pliers? This pin is pushed back by an internal spring. So if you press him down with the pliers, he'll go back to the same place.
#7 16018721 25 Oct 2016 22:50

Anonymous Anonymous

Level 1

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Post #7
16018721 25 Oct 2016 22:50

This is the old Danfoss RTD.
there is a typical M30x1.5 thread
The first and best thermostatic head from the store will fit.
The valve closes by pressing this protruding pin,
it can be hard to walk when there was no head, you have to start it
because the thermostat will not regulate.
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Topic summary

The discussion revolves around a broken knob on a radiator, preventing temperature regulation. Users suggest installing a thermostatic head, emphasizing the importance of measuring thread diameters (e.g., M28, M30) and taking photos of the valve for accurate part selection. One user mentions that the valve is a Danfoss RTD model with a typical M30x1.5 thread, indicating that a compatible thermostatic head can be fitted. There are also suggestions to use pliers to adjust the valve, although this method is debated regarding its effectiveness. Overall, the consensus is to seek a replacement head rather than replacing the entire valve during the heating season.
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Broken knob on the heater

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