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Thanks for the suggestion. I'm not aware that the time is being set automatically but then, all I really care about is the external temperature!

The description on the box is Glow.worm 0020093880, with a little picture and bar code. I bought it from City Plumbing. Their description is GLOW-WORM WIRELESS OUTDOOR SENSOR with the same part number and 717949, which I think is the online quick access code. The price was £47.93 including...

Another update. I bought the Glow Worm sensor and kept it indoors by the front window for a few days to be sure the battery was charged. I have just paired it with the controller and boiler. I'm not sure whether setting Learn Mode ON at the controller (first), or pressing the Learn button on the...

Sorry, the reason I asked was a response from Vaillant Technical Support where I was instructed to use the controller and go into LEARN mode. She said: "once you get the new VR20 you will need to go into page A1 and turn Learn Mode on for it to pair to the receiver." I'm pretty sure I tried...

Does anyone know the difference between the VR20 and VR21? When I get to the software versions screen on the VRC430f, it says the sensor version is VR21.

Thanks for all the posts in this thread. Can I just ask if it is necessary to press the Boiler/Radio Receiver Learn button, set the VRC control centre into LEARN mode and then press the red button on the back of the VR20, or is it just necessary to do the boiler and sensor buttons. After...

Just to wrap this thread up, the old sensor went faulty again after a day or two. I bought a new VRC 430f controller set on eBay. The old controller wouldn't recognise the new sensor, so my best guess was that they were digitally connected. The British Gas engineer has just been this morning to...

I have had a VRC430f system running mostly without problems for several years (extended warranty has now expired). Until recently, the only problems were fixed by boiler maintenance, but I had a faulty external temperature sensor. That is now fixed - presumed condensation in the sensor fixed by...

Thanks for that. I don't remember them saying that some items were not covered, but they can change the rules when they like and there isn't much we can do about it. The sensor seems happy and I have a good signal coming from it - 6 through the wall - and that's better than the receiver in the...

A quick update. I read a separate thread here where there was a suggestion that the outdoor sensor had condensation inside. This is quite possible with the amount of rain we have had! I had the sensor indoors for a few days, so it had a good chance to dry out. I had been totally unsuccessful in...

I have had a Vaillant ecoTEC boiler with the VRC430f Weather Compensating Controller for several years without any serious problems. Recently, the external temperature sensor has been showing 18 or 19C, so the heating is not doing a lot. The Signal Strength screen in the VRC's Installation...