Anyone had any trouble with the timer stop working I can only have it on all the time or off. It will not work with the timer part at all ,it was working fine up until a couple of nights ago and has been installed 2.1/2 years. When you move the selector you can hear it click into the timer position which should work but it will fail to come on, or if you set it when it is due to come on it will fire up but not turn off on the timer. driving me nuts as i'm either to hot or to cold!!