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  #1  
Old 06-03-2007, 08:39 PM
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560sel aux fan won't come on?

1990 560sel when the ac is on on at idle the temp rides up to 90C the aux fans won't come on. is a fuse or electrical connection?

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  #2  
Old 06-04-2007, 12:48 AM
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Probably low on freon.
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  #3  
Old 06-04-2007, 07:48 AM
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Try 2K rpm w/ac on.
If still no fan, jumper red switch with pigtail wires on the side of drier/reciever, key on...
Report findings............
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  #4  
Old 06-04-2007, 04:47 PM
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why would low freon have anything to do with the aux fans coming on? the air blows cold. the engine temp is only riding high when it is very hot outside. the jumper switch from what to the drier?
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  #5  
Old 06-04-2007, 04:59 PM
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What do you think triggers the fan??? The pressure on the high side of the a/c system..sooooo, if you are low on refrig., you are too low on pressure to trigger the fan sw on the drier.........................
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  #6  
Old 06-04-2007, 05:18 PM
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Go here and read post #13
http://www.peachparts.com/shopforum/tech-help/190051-function-ac-high-temp-sensor-post1525184.html#post1525184
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  #7  
Old 06-05-2007, 10:17 AM
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Also, what is the ambient air temp? If it's too cold to produce sufficient high side pressure (in conjunction with low freon), the fan may not be triggered normally.
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  #8  
Old 06-05-2007, 06:21 PM
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ambiant air temp when it happened was 87 outside, typical arkansas weather
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  #9  
Old 06-05-2007, 06:29 PM
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Have you jumpered the high side aux fan switch yet??

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