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Old 09-05-2017, 01:08 PM   #2
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 40,625
 

2003 L-Series 3.0L Sedan
Default Re: 2008 XE AC issue

Is this 10 amp fuse labeled for the AC system (compressor power) or blower motor inside the car? If its for compressor power, try removing the AC diode near the fuse - its labeled as a white arrow with a line across the point. The fuse box should have labeling to show which way the arrow points when replacing it. This diode acts as a one way electrical valve; voltage and current flows in one direction and cannot flow in the opposite direction. It protects the AC relay electrical contacts from arcing when ac is turned off. Diodes sometimes fail by shorting internally and allows current to flow in the wrong direction resulting in instant fuse blowing. When its removed, ac works. Replacement from junk yard (maybe any diode from any car with similar dimensions) or auto store/online.

The cooling fan turns on immediately when ac is used but only if the compressor runs.

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