Hi everyone. I'm trying to fill my A/C system with R134a. This is a new system that has been held at vacuum (and actually holding it) for a year while I got other things in order.
I got it to take about two and a half 12 oz cans of refrigerant. The compressor turns on, so that parts's working. However, the high side reads very low, and I'm getting hot air out of the vents (not warm air -- hot air, like the heater is on, but it's not). The metal of the manifold block itself is also hot to the touch.
My setup is a proper manifold set with the lines correctly connected to the high and low sides of the A/C system. I have an early car, but it has been updated to the later system with the high pressure switch. Literally the entire system is new front-to-back, including the hoses, accumulator, compressor, condenser, evaporator, orifice tube, high pressure switch, etc. I made sure to pull vacuum on the system to vacuum, but it was already sitting at vacuum so that wasn't really necessary.
Any idea what I'm doing wrong?
Here's a picture of the gauges with the engine and compressor running:
IMG_1750.jpg
And with the engine off:
IMG_1753.jpg
Thanks!
-- Joe