Automotive Air Conditioning Information Forum

A reading of about 50 PSI on the low side is normal while charging. Not surprised you have no cooling with only 8 ounces net weight in the system.

A system that holds vacuum is no guarantee that it won't leak under pressure.

Why did you jumper the clutch? Refrigerant carries the oil, which ...

... . I jumped the pressure switch which kept the clutch engaged, but still won't draw any more refrigerant.
If you force-run the compressor, especially with little or no refrigerant in the system, you'll risk ruining it. Your best bet is not to jumper anything.


... . the can taps were the ...

Appreciate your following up with the solution.

What did you do to fix the problem?

Chances are, the compressor won't engage with just a few ounces in the system given that the system holds 3.2 pounds of refrigerant.

I wonder whether your low-side service port adapter is actually depressing the Schrader valve enough to get any refrigerant into the system or whether you're charging ...

The 52 PSI reading on the low side translates to an evaporator temperature of about 55°F. By the time the air passing over the evaporator gets into the cabin, it will be warmer than that, which explains the little to no cooling that you're experiencing.

You'll need to get the refrigerant charge ...

If you can locate a complete Mazda A/C system from about 10 or 12 years ago, it will be a *self contained* system using a fixed-displacement compressor that is not ECU/BCU controlled. Anything later than around model year 2016 will have a variable-displacement compressor and ECU/BCU control.

The ...

A few questions and comments:


Note, evaporator, condenser, expansion valve, POA and drier have all been replaced with new items.
After replacing all these components, is the system now completely "dry" (except for the Sanden compressor), or did you run the system afterwards with the old ...

From the compressor failure, it's probable that debris is still partially blocking the system.

Did you get a look at the old oil while replacing the components you mentioned? If so, it was probably black in color, which would require a thorough system flush. Then, new oil would have to be added to ...

... . It sounds like you're saying that not all TXVs need an inlet screen, am I overstating that?
I saw the UAC ex10362C, is this something (if it fits) I can run in the inlet of the TXV? I guess my main concern is the TXV orifice getting clogged over time.
The type of screen you mentioned ...