In my first post I stated I put oil in it...but yes, I'm not sure about the long term effects of running it without 134a in it.

I don't understand the systems of AC well enough...

Thank you! I'm happy to hear that I'm not the only one confused about this thing! I went back and checked my records - this compressor was bought new in 2014 and installed shortly after. The previous compressor's pulley blew up on the drive from Oregon to Oklahoma and so the car was not driveable un...

This is the Clutch Hub Plate:


My Denso compressor is type 7SEU17C.

I found this youtube video that discussed replacing the "clutch hub plate" on these Denso compressors (have to buy aftermarket as Denso does not manufacture this part). I believe this Denso compressor has what's called a Swash plate... What "faulty control valve" are you referrin...

Yes - I'm careful about not letting air IN to the system. I'm guessing then - from your last post - that my compressor is not running. On a regular, clutched compressor, I can easily see the clutch engaging, but on this clutchless compressor (Denso 471-1474), I'm not sure what's going on. It sounds ...

Thanks John - I have done all of the above. I just got done using the same set of gauges to successfully recharge my Subaru Forester. I guess it's possible that the low pressure connector is not fully depressing the schrader valve, but it is drawing a vacuum and if I open the blue adapter valve I ca...

Sure feels like air - not very cold. I've seen 134a come out and this is not like that!

I am using gauges, charging from 12oz cans and only through the low side. - car running, revving to 2000+ rpms. System takes 28oz.

My first post here - I replaced the compressor on my son's C240 years ago - maybe 6-7?? Never charged it up - did put the right oil in it. Not a car that he drove that much, so wasn't a priority. Just completed a bunch of work and went to recharge the AC. Drew a good vacuum and it held overnight. Bu...

I am fixing the AC on my 1993 Ford E350 chassis motorhome - going back with R12 (since I have it). I have replaced everything - all new parts as my old FS15 compressor black died on me! Bought a new compressor online (Amazon) and it froze up on me during my first try at recharging. Not sure what hap...