the car is having AC problems. at a stop the AC blows warm air, as i start and continue to drive the AC gets cold and back to normal. weird part is, at a stop for 4-8 minutes, while its blowing warm air (AC is on), the temp gauge goes up. i test drove it today, as soon as i noticed an increase, ill turn off the AC and it stops and recorrects itself within 3 minutes. i checked the coolant, its normal. also checked the AC freon, which is full. maybe thermostat? both fan works.