Electric Radiator Fan - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 10-30-2007, 02:04 AM Thread Starter
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Electric Radiator Fan

Can somebody tell me how the electric fan in front of the radiator operates?
I have a 2003 MB Sprinter 413 CDI. Sometimes the fan is working and other times not. Does it cut in only when the A/C is on? Or when the engine starts to overheat? Is there a service manual available to the public?
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post #2 of 5 (permalink) Old 10-30-2007, 05:39 AM
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I'm not familiar with a Sprinter but my guess is that the electric fan would kick in when A/C is operated or if the coolant temperature gets too high. Normally the coolant temperature should not trigger the fan.

If it has a continuously driven compressor, perhaps there is some additional control taking into account the actual cooling needs, to avoid the fan blowing always (as the compressor would be running all the time).
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post #3 of 5 (permalink) Old 10-30-2007, 09:38 AM
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Fan on front of the radiator means you have belt-driven fan behind it?
Those electric fans operate usually only with AC on.
MB have quite efficient cooling system, so not much of air pushing is necessary. I used to have E320 with single electric fan behind radiator. I had it parked with AC on on 120 F desert. Don't recall hearing the fan ever operating at full speed.
This topic is one more proof that some MB owners have to much time on their hand and are finding things to worry about
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post #4 of 5 (permalink) Old 10-31-2007, 05:34 AM Thread Starter
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Kaitek1,
Thank you for your comments.
Unfortunately I don't have time on my hands. I have more to do then worry about nothing.
The reason for my posting was because I found a fuse in the engine bay continuing blowing and traced it to this fan.
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post #5 of 5 (permalink) Old 10-31-2007, 05:37 AM Thread Starter
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Diesel Benz,
Thank you for your input.
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