Diagnosing HVAC Controls?

[DarkStar]

Well car is being torn down for Clutch, Starter, IMS, RMS, Sump Pan Gasket and other lil things the car needs.... I have some time to play with figuring out the AC.... Help me out guys.... where do I need to look now.....

[itsnotanova]

Have you taken a look at the fan resistor yet? The Porsche design seems to be stout because the resistor doesn't cause a lot of problems. On other makes it's a common problem. I've had to replace the fan resistor on my F350 and Grand Cherokee because they had corroded.

I can send you one for $25 shipped. Cheapest I found new was $175

[itsnotanova]

I talked this over with a friend today and he thinks it a fuse or relay giving you some issues. He didn't think it was the resistor because it "should" still work on the high fan setting. I have to agree with him mostly about the resistor working on high. Most fan resistors I've messed with where suppose to still work on high. The resistor I replaced on my jeep had shorted and caused the wire connection to melt. Still doesn't hurt to take a look back there though