Hi, Have been trying to determine the location of a leak on this Caravn. It has 3.3 and dual air, worked great till a couple of summers ago, developed slow leak,now it will leak off completely overnight. I put a dry nitrogen/R22 trace charge on the system and started sniffing. Also did a visual inspection on the system for obvious signs of leakage. Really clean connections, hoses show none of the usual evidence of oil/dirt accumlation from seepage, no audible sounds of leak except in firewall area. I guess after reading a lot of different posts about the ac systems, I would like to know just how frequently does the evaporator fail in the dash? Thanks for the input.

The vehicle has 98,212 miles on it at this time. and has never been wrecked.
regards,

doc