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99BIGREDDODGE 03-22-2010 01:40 PM

AC Problems
i am having problems with my ac system. it will blow cold air for about 10-15 min and then the air gets warm and wet. i blew out the drain in the firewall and is still doing it. the refrigerant is still goad and no leaks. anyone have any ideas?? dont want to take it to a ac shop$$$$$$. 99 dodge ram 4x4 deisel

RamTech 03-22-2010 02:22 PM

What are your high and low side pressures and at what ambient temp with the system off and on?

99BIGREDDODGE 06-11-2010 04:35 PM

not exactly sure what my pressures are, but it works longer on low humidity days and also my pass side floorboard is getting wet. and its not antifreeze. i think the drain may be stopping up but not sure....and not sure how to get inside to do it.

RamTech 06-11-2010 06:24 PM

Your evaparator is probably freezing up. I'll have to check to be sure but I think theres a temp probe in the evap fins that's supposed to shut off the compressor to prevent this.

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