Just got my AC conversion to R134 charged and working. Still some improvements to be made, and a few questions:
1. There is a thermocouple-type thing that is connected to the AC control panel which I assume is a temperature cutout to keep the evaporator from freezing. I have this clipped in with the capillary tube from the expansion valve on one of the hard lines. Is this the appropriate place for this, and if not where should it be and how should it be fixed in place?
2. Was there ever a factory AC on/off switch that fits a blank spot in the dash? I want to rig some sort of switch so that the AC does not run on various vent selections other than heat.
3. Anyone have something rigged to trip the high speed fan mode at high pressure or idle? Notice a significant cooling difference sitting stopped with just the normal constant-on low speed fan in AC mode. I have an aftermarket binary pressure switch in the lines, was thinking of using one of those trinary switches to trip the high speed fans, or possibly also putting a selector switch in the dash for fan override control of "HIGH - AUTO - LOW". Anyone with experience here?
4. Odd issue - was driving around with the blower fan on "4" for my first round of testing, then randomly lost this speed completely. I thought I blew the fan fuse, but realized that I still have speeds 1-3. This seems odd as it usually would be the opposite and indicate a resistor issue. I'm thinking a bad connection somewhere...
Anyway its cooling decently right now, I think I have some more performance to get out of the system with some more tweaking. Also think I may end up needing to add a little more freon. Also need to make up some new cardboard ducts around the condenser. When all done I will post up a long detailed post with a lot of "lessons learned".