Anybody have experience with this year Prism or Corolla? My girlfriend's car has been exhibiting some overheating issues tied to the use of the A/C system. Basically, the temperature remains constant when the heater's blowing full force, but turn down the heat or the fan and the engine temp starts rising
Now the radiator fans are operating and I suspect they reduce their speed when the a/c system turns on, I don't have any idea what's wrong per se, but I plan to change the thermostat, flush the system and put in some Toyota red antifreeze and see if it gets me anywhere. Any other suggestions from the peanut gallery?

Now the radiator fans are operating and I suspect they reduce their speed when the a/c system turns on, I don't have any idea what's wrong per se, but I plan to change the thermostat, flush the system and put in some Toyota red antifreeze and see if it gets me anywhere. Any other suggestions from the peanut gallery?