87 300sdl AC Issues

[Kincaidj]

My symptoms are "cool" but Not Cold air on Normal setting all blower settings work properly, flow comes out the right vents. Temp wheel seems to go from cool to hot and back properly. But, going down the road, it can fluctuate from cool to a mixture to roasting hot and back to cool.

A few years ago, the monovalve had the repair kit installed and think it was OEM instead of MTC. I have another OEM on order. The cabin temp aspirator is Not sucking air. I found it by removing the glove compartment insert but can't figure out how to actually get to it behind a vertical air duct and a horizontal plenum.

I'm thinking about going to an decent shop to check AC pressures. It has been converted to R134. The aux fan appears to come on when called. If someone could help me with the best way to remove test and/or replace the aspirator and the ohms for the sensor to see if it's good I would appreciate it.

Tomorrow, I'm going to try to clamp the heater hoses to see if I get all cold