Hi, my 02 4.6is has had an extremely annoying problem with the climate control since I bought it in Feb. The air-con works perfectly but when I turn the heater on and after it's been on for around 2 minutes the whole climate control screen Shuts itself off but the heater still runs but then I can't Shute it off. My Indy has replaced the whole unit twice! And the FSR, it's seriously driving me insane because I can't figure out at all what it could be.

Thanks!!