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Old 06-27-2002, 01:44 PM
Posts: n/a
Coolant temp is not what causes the aux fan to come on. High side A/C pressure causes the fan to come on to bring down excessive high side pressure to prevent A/C system damage. There is a high pressure switch, probably mounted on the filter drier.

If the A/C charge is a little low, the fan may not come on at all.

Good luck,
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