I have changed the thermostat and heating sensor on my 2000 3.1 gran prix. Both hoses are hot when I have the car running. I turn on the AC and the fan comes on, but when I turn on the heater the temperature starts to go up.
changed thermostat, heating sensor and replaced the antifreeze. AC works but when I turn on the heater it starts to overheat. AC fan turns on and both hoses are hot.
Tuesday, March 6th, 2012 AT 2:16 PM