90 GMC SIERRA SLE C3500 Dually CONVERTED TO R-134A
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Many years ago my truck was converted. However, I don't drive it most of the year. I put AC Pro (ACP-105) sealant in it this year, and my pressures appear to be ok after adding additional 134a. The discharge tubing from the condenser is cool and sweaty, but not cold. The accumulator doesn't sweat like it used to do and it isn't cold. My understanding from internet searches is that the orifice tube is behind the grill, under the passenger headlight. Based on this info, could the orifice tube need to be replaced, is the orifice tube located there, or is it closer to the firewall where it enters the evaporator? Without evacuating the system, is there any other way to diagnose my AC not being cold? Thanks in advance!!