Quote:
Originally Posted by mannys9130
In the extreme Tucson summer, my aux fan runs with the AC after a few minutes of driving. I force it to run high speed in summer because these AC systems can't handle that heat, even with R12. If you live in a moderate climate, the aux fan probably won't come on with the AC.
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I have never actually had my AC fan come on high speed under normal circumstances unless I was deliberately trying to get it to run to test everything out (hot day, AC running, slow speed pulling hills in my neighborhood with a blanket over the grille), but the low speed mode will come on rather quickly in hot weather in summer.
I suppose it doesn't come on high speed because my car never exceeds the second line on the dash, 100*C, ever since I cleaned the radiator of debris and replaced the fan clutch in 2012. Oddly enough, though, my 95 diesel will get to about 95*c pulling hills at low speeds even in "winter" with temps around 55 degrees, but that seems to be about as high as it ever goes even at over 100*f.