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When the A/C is on, the low speed fans run continuously.
When the A/C is off, the low speed fans start running at a certain coolant temperature. They may be enough to keep the coolant temperature from rising much further depending on outside temperature and speed.
If they don't, then the high speed fans will start running at a somewhat higher coolant temperature, Another forum member or a search may say what those trigger temperatures are.
Last edited by thom4782; 08-22-2015 at 06:45 AM.
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