I have a 1999 Toyota Corolla 4 cylinder 3 speed auto transmission with around 112,000 miles.
This thing will run you out in zero weather when you use dash or floor or combination. As soon as you turn it to defrost, it kicks the AC on ( I know this is normal in order to remove moisture from the cab) the thing will start blowing cold air out vents. Turn it back to dash or floor and it will take 3 min to become hot again. I replaced the thermostat and flushed the cooling system to ensure it is good. I ran the engine to get it to cycle the engine fan and it cycles fine and coolant apears to be circulating fine. I touched both inlet and outlet to heater core and they are hot to the point you cant hold them very long.
Im not sure what to check next. Is there a ambient temp sensor that senses outside air in order to control the AC on heat? Anyone have any ideas?
Thanks in advance.
have the same problem?
Saturday, October 20th, 2007 AT 1:58 PM