I am working on a unit and installed a honeywell focuspro 5000 thermostat. I have it operating by batteries. I can flip the disconnect on outside, and the unit will run even if the thermostat is switched to off. I have Y and C going to the contactor coil, and it is getting voltage even with the thermostat switched to off. Could the thermostat be bad? All the wiring in the airhandler and the outdoor unit appear to be wired right by the schematic. Thanks!