Hello, I am having problems with my underfloor heating. I'm in a 2 year old rental house and since we moved in, always one of the rooms remains cold. When I manage to get that one to heat up, the room next to it, that was previously warm, goes cold! There are four zones each with their own wireless sensor. I am unfamiliar with the terminology for underfloor heating (manifolds and all that) so it is very difficult to find out what's wrong from online forums. I would be so grateful for some help please! Obviously the underfloor heating works in all rooms as they have all got warm at some point, but just not all together. The floor in the unheated room is freezing.