Hello guys and gals. My cousin called me out to have a look at her heating which isn't working. She has a Worcester combi and the hot water is fine. When we tried to program the RF stat it doesn't seem to be talking to the reciever and calling for heat. Even in manual it's doing nothing when you crank it up to 35deg. My first thought was that it wasn't paired so found a manual for the stat and it says that it doedn't need to pair. The stat is TH-2006RF, the reciever is a Salus RXRT505, after looking at the manual for this reciever, it does need to pair and will constantly try until it does when you switch it on. She moved into the house in May and has only just tried the central heating. I have a suspicion that the reciever and stat aren't compatible and whoever sold the house either messed up or deviously just stuck any old thermostat in there in the hope that my cousin wouldn't find out for months. The stat isn't a Salus one but it does use the same frequency (868) I'll find a couple of pics of the stat and reciever if it would help. Am I right in thinking that she needs a new stat that is made for the reciever she has?