Yes, when I move the control I get the luke warm air then in the cold possition I get dead cold air, so the controls are working. I have never came across anything like it. The two pipes going into the matrix are hot but when I turn on fan the heat is slightly hot for a short time then luke warm again as if there is not a constant or fast enought suply, Thermastate is deffinatly ok..
Weather getting colder I had to wear gloves last Friday,
Cheers, Pete