I had my A/c recharged the begining of the summer, and they put a leak stop in it, because i would slowly loose it. It helped for a while and lasted a few months. Than it was gone again, had another guy take a look at it. They put in dye, and filled it. It sat over the weekend, and was gone by the next night. Now i was going down the shore that week and it was like 100 deg out, so i filled the refrigerant, put a can of red dye/stop leak, hoping it would somewhat fix it. It worked great down to south jersey and than the truck was parked for the week. I went to leave and it was hot again, so i stopped at the auto parts store before i got on the parkway, and filled it back up to about 35 psi when the pump was on. It lasted 200 miles home, ice cold. However, i was home for about an hour. Went to go back out and the a/c wasnt working again. No pressure again. Now obviously theres a leak in it, However, after all that dye that was put in it over the summer, i would think it would be pretty easy to find. There is no dye to be seen anywhere around the lines or pump. It also only seems to leak out when the pump is off. Now another weird question, is that when the defroster is on cold, it puts out a smell, almost seems like the smell of the dye. Is that possible? And does anyone have any ideas what to do. I work in a shop, and mechanically inclined, however, A/c is not somthing i work on much or know much about. Any help would be great! Thanks

 

In these dodge the most common thing to leak is the evaporator under the dash. If it is leaking there your not gonna be able to see it unless you take the dash apart. Also the reason why it mostly quits working when the truck is off is because the line pressure goes a lot higher when the compressor is off.

 

I would agree that it is the evap core. I had the same issue with mine. There is a small plastic box that seperates the evap from the heater core, unfortunetly that collects all the junk that falls between the cowl and rots out the evap. You do need to remove the entire dash to get the heater box out it is the only way. The evap core is kind of expensive also. I changed my heater core as well, it won't be long for that to fail too, if it was junk that ate away the evap, one sits right on top of the other. I also removed the plastic box, it was over enginering and by removing it, it allows the stuff to fall out the drain tube in the bottom of the firewall. You won't have to worry about disconecting the A/C lines the pressure will already be off them if it is empty. You will have to do the coolent lines and don't forget to bleed the Coolent when you are finished. It's not really difficault and if you are small enough you can unbolt the dash and sterring wheel and rest the dash on the seat to squeez behind it. Good Luck!