This is strange. Everything turns on when I use the thermostat (luxpro programable) to set cool auto or on. The problem is, it does not turn off. When I use the switch on the thermostat to the off position, the fan in the house turns off, but the fan from the outside does not. It continues to run coolant thru. I have to go to the furnance and turn off the main power switch. Any ideas? is it a thermostat issue, or did a wire corrode and pop loose.