Several days ago when I returned home from work I discovered I was dripping water from underneath my truck. I popped the hood to find that it was comming from the AC Compressor. This kind of baffeled me because I couldn't remember running the AC. So next I checked to make sure that the AC wasn't in the on position in my truck. It wasn't, however I did have the defrost on, but I had it on the cooler temp setting not hot. I was simply trying to remove some condensation on the inside of the windsheild. This confussed me because I didn't think that the AC Compressor should be running unless I had the AC on. I thought that if you had the defrost on in the cooler setting that your vehicle would just blow in outside air not use the AC.
So my qustion is, does the AC Compressor normaly run if you have the defrost on the cool mode. If not, could this problem possibly be related to a recent K & N FIPK installation. Not that I feel this is the cause of the problem. I just never noticed it until after I installed the Intake. I would greatly appreciate any help you guys/girls could give me. Has anyone else had this problem, if so, do you know why or what might have caused it. Thanks

 

The defrost position turns on the AC compressor. You had it right about removing condensation; the AC dries out the air and that's why it operates during the defrost mode.

This is a normal situation and is pretty much universal in all makes of vehicles.

 

From what I noticed, the A/C compressor (sp?) runs on my truck at all settings except for panel and floor. Even on panel+floor it runs. One good reason why you'd want to have the A/C compressor going when the defrost is on is to ensure that you have dry air shooting at your fogged up windshield.

Did you have enough water underneath your truck to cause some localized flooding? If it wasn't an overly excessive amount, I wouldn't worry too much.

 

Thanks alot guys, I really appreciate this, I feel so much better knowing nothing is wrong. Thanks again!!!!!!!

 

The other guys are right about the compressor running.

Unfortunately, you still need to get your a/c serviced. Condensate running off the compressor means your low pressure line was freezing up and causing condensation to freeze, then melt off once the truck was turned off. Freezing low pressure line is a symptom of low refrigerant level.