Originally posted by RoadRunner:
Try running the AC on MAX.
The engine should run cooler.
Running the AC set to A/C circulates OUTSIDE WARM air across the evaporator
which translates to more heat coming from the Condensor.
If the condensor gets hot, then the fans will suck
the extra heat across the radiator, making the radiator warmer.
When it runs on MAX, you recirculate the interior air.
As the interior air cools down the condensor will also cool down
since ther is less heat in the air for the evaporator to extract.
This will translate into your engine temp coming down as well.
At least this is how it works on my Tour.
Thanks Pete, that makes sense and it sounds like it'll help but what I really want to figure out is why the car starts to overheat when I have the a/c on, and why this only started to happen after I took the car to my mechanic (dumb schmuck.) to change the water pump (metal impeller), thermostat (Motorcraft - stock - oem), dual mode dampner, and both belts...
I guess what I'm trying to say is that I want to fix the source of the problem, and not just the symptoms.
Frank
