Quote:
Originally Posted by 85 DSEL
It's an "auxiliary" fan. This means it is an additional cooling mechanism to the 'normal' cooling fan. The aux fans kick on when the engine temp reaches a set point (I think maybe 100-105C?) - above what the normal fan might be able to achieve. There's really no connection of the AC and the aux fans - other than, there is more 'pull' on the engine when it is engaged. Hope this gets you thinking in the right direction.
Someone step up and correct me if I'm wrong...  |
Wrong, the aux. fan should operate when the high side of the compressor rises. If it doesn't operate, the high pressure switch on the drier/receiver will shut the compressor off.
With gauges connected to the ac system, at idle in park, you can watch the high pressure rise, the aux. fan turn on to cool the condenser, and the high side pressure will drop.