Thread: should my acc fan run when ac is on
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Old 10-03-2004, 12:39 AM
AusMBtech AusMBtech is offline
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Join Date: Jul 2004
Location: Sydney, Australia
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You auxillery fan should operate when your engine temp rises (usually 105degC) over normal temp or when the a/c condensor pressure rises (causing higher condensor temps) due to low air flow. It' shouldn't run as soon as the A/C is turned on.

Newer cars will turn the engine fan on low when a/c is turned on, usually 10% speed.
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