Hi all,

Been reading EF for a while but first post, please let me know if its the wrong place etc. And I have tried DIY forums but didn't get any replies so far (recommendations on swiss DIY forums welcome).

Just moved into a new rental apartment a couple months ago (Bern), the weather had been good and the heating (from a central boiler for the whole building) wasn't on, fine with that. Bit colder recently, and our radiator comes on (I assume someone put the boiler on), tried to turn our radiators off but two of the thermostatic radiator valve heads in our apartment are damaged so stays on for those radiators even in * position (I can see the damage prevents the valve closing). The radiator does go off if I hold the head in position - so hopefully the value works fine and just the head needs replacing.

I figure should be easy enough to replace, the valve heads throughout the apartment are all the same Danfoss Thermostat ones (pictures attached). So I bought two replacements, the only Danfoss ones I could find easily online in switzerland (https://www.galaxus.ch/de/s2/product...pplier=4867603), the width seems fine but the head seems too short to attach to the value properly? On the website and packaging I can't see anything about length/size. Any recommendations on which valve head should fit? Or I am being stupid while fitting it?

The old value heads slot really nicely onto the value, whereas the only replacement I found has an annoying screw and even fitting on fully open, closes the valve if I push it far enough to try to attach. Pretty sure it's the wrong size.

Thanks in advance for any help! 😊

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In my case I simply contacted my Hausverwaltung and they took care to replace them.
Maybe you can do the same?

It looks like you ordered the wrong valve...

You need this one:
https://www.hornbach.ch/shop/Thermos...0/artikel.html

See this table for reference:

I got programmable electric/electronic heads for mine and save a ton of money each year. They were about €10 each. You can even get 'smart' wifi connected ones these days.

Me too! Though we've only got a couple of radiators - the test is underfloor.

Mine are linked to the home automation system and they even shut off if someone opens a window.

Thank you, this looks like exactly what I need! Really appreciate you taking the time to show me the table and giving me the link.

Hopefully will help others too - thank you!

Link?

I have those:

I bought them at digitech:
https://www.digitec.ch/en/s1/product...upplier=406802
from operational point, they made my living much nicer, before I was dependent on how they were changing the temperature in the whole house, so it was often too hot. They also have a system that you can control centrally. There are few caveats:
- they are compatible with Danfoss system, but the system how you fix them is not that intuitive (you have to press a plastic ring so hard, you think you are going to break it)
- units are big, in my case they are protruding into the space, the fixture is made of plastic, in two rooms they are in the way and from time to time I do pull them out.