Removing Danfoss TRV cover??

HaplessHubby · 26 Nov 2015

I am having a heck of a time trying to get the plastic control knob off an older-style Danfoss thermostatic radiator valve in order to gain access to the stuck valve pin. It does not seem to unscrew and there is no (obvious) mechanism to allow removal. I'm sure there is an easy trick to do this but sadly I don't know it! My Danfoss radiator valves are around 15 years old. Can anyone help. Thanks in advance for any advice you can offer

leakydave · 26 Nov 2015

Photo would help...

Phill Peck · 26 Nov 2015

The knurled black plastic bit where it attaches to the brass body will twist.
It may have a retaining plastic clip that needs to be popped out with a screwdriver to allow it to twist.

This is of course an educated guess based on what TRVs I think u have, as suggested a picture would help

HaplessHubby · 26 Nov 2015

Many thanks for prompt response.
I'll get a picture posted when I get back to house.

HaplessHubby · 26 Nov 2015

Please find attached photo of the TRV in question.

Phill Peck · 26 Nov 2015

Tbh I'm not sure I've ever seen that particular head but u would be having a look at the small square facing up on the knurled black bit.
See if that will pop/prize out.
I would then expect the knurled bit to twist.

Btw u don't always have to remove the head to unstick a pin.
Set valve to max turn htg on and hit the valve with hammer. Not so hard that u are swinging at it but a couple of short blows and see if the heat start to comes through.

Aquaheat · 26 Nov 2015

On these there was generally a small grub screw located on the lower half of the valve. It looks to be facing up on yours but is hard to tell as picture isn't very clear.

Undo grub screw and head should pull off, might Nedd to give it a wiggle and a bit of oomph as they can be quite tight.

Jon.

HaplessHubby · 5 Dec 2015

Problem solved!
Many thanks to all who contributed

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Removing Danfoss TRV cover??

HaplessHubby

leakydave

Phill Peck

HaplessHubby

HaplessHubby

Phill Peck

Aquaheat

HaplessHubby

DIYnot Local

Similar threads