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Old 07-24-2001, 01:45 PM
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Join Date: Jul 2001
Posts: 14
I have a 230CE w124 '88, with a single A/C aux fan.
The fan used to run at high speed now and then, but has never operated at a lower speed.

Now, should the fan run at low speed all the time as long as the A/C button is pushed?

And, secondly, where do I start searching for the fault?
I have heard people talk about a low speed resistor?


Anders Eklo - Norway.

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Old 07-24-2001, 09:41 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
The low speed fan will come on when the pressure inside the a/c system gets too high. The best way to check is to bridge the high pressure switch on the drier and see if it comes on...
Donnie Drummonds
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Old 07-25-2001, 09:33 AM
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Join Date: Jul 2001
Posts: 14
OK, then it apparently works alright. I heard some talking about there being a low and high speed mode of the fan. But since I have only one fan, this should kick in at high pressure, and at only one speed. Am I right?

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