90 AC with Parallel flow condenser and R12

[VetteMed]

Originally Posted by scottfab

I'd normally let this bogus statement slide but worry that someone might believe it and therefore possibly get the wrong results and yet have a perfectly good system.
It has been claimed that "Temperature setting has nothing to do with operaton"
If the temp setting just happened to be set to say 80deg or so you will not get the desired lower temp. It's best to be sure.
I recommend checking the temp setting for the lowest setting that way there is no confusion about what you're asking the system to do.
AND it will do it for a long time.
OR lets say the temp setting was at 72 and you are in a garage with no sun load. The AC does it's thing based on sun
load worked in. If the car's inside temp is close to the 72 mark the AC will not be as cold even if the outside ambient is 80-90.

Have to agree with Scott here, I know for a FACT that in the auto climate control system, the temperature setting does affect the position of the door which blocks off the heater core. At any setting above 65 (maybe even anything above 60) degrees, there's going to be some degree of opening of that door.

Jeff's car has manual A/C. When the temp lever is at anything less than full cold, the door will be at least partially open to allow some air to be warmed by passing over the heater core.