Hello, everything is working with my rf controller except the comfort temp setting. It's set to 15. When I turn the dial it occasionally jumps to 15.2 then back again. The dial works on all other aspects of selecting things, timer, modes etc. As it's set to a lower temp than what it is, it won't allow my heating to kick in. If the temp goes below 15 the heating does work but goes off when it reaches 15. Any suggestions greatly appreciated.