Thread: w124 aux fan
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Old 02-06-2017, 11:02 PM
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bsmuwk bsmuwk is offline
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Join Date: Jan 2009
Location: IL / WI
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quick and dirty function check with car running/AC on - pull off the two wires coming of the pressure switch on the drier and connect them to each other. This bypasses the pressure switch and should see the aux fan kick on. it will NOT be full speed.

if you have dual fans, a single fan will run. if the car truly starts running hot, it will kick both aux fans on MAX, to bring temps down to just under 100* C.
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