Originally Posted by Jim Godfrey
I have performed some more troubleshooting and wanted to share. I had some pictures, but my phone did not sync with the google cloud yet.
Upfront I found two switches, a thermocouple, and a pressure switch. Each one was closed. After starting the engine and taking measurements, 12v was passing through each closed switch. This was telling me that there was no problem upfront and the signal was being sent to the rear.
I went to the engine. I could not turn the compressor by hand. I started the engine and discovered that 12v was not being sent to the clutch on the compressor. Because it is so close to the alternator, I jumped the wite to make it hot to engage the clutch. When I did, I heard the clutch engage, but it sounded like slipping brake pads.
My conclusion is that I have a blown fuse or relay somewhere because either the clutch or compressor is bad.
Time to take this to my experienced friends. At least, I know where to have them focus without wasting much time.
I will follow up at a later time.
Seized a/c compressors are a very common find in the last 20 years or so with the mass merchandising of DYI recharge kits.
Most DYI folks are not adding 1 or 2 oz of refrigerant oil during the charging process and simply just add refrigerant only.
If you lose refrigerant ...you have lost some oil ....it may have been minimal but some oil left the system along with the loss of the refrigerant.....do this re-charge with no oil added enough times and the next thing you know the compressor seizes due to lack of lubrication and if youíre lucky the guts of your failed compressor have not been pumped thu youíre a/c system.
If your compressor seized? personally I would flush the a/c system during the process and install some kind of filtration to protect the new compressor from any residual debris.
These folks https://airsept.com/Products/Details/32
are top shelf and offer some very nice choices in a/c filtration and other products.
I have no affiliation with them other than having used their products on more than one occasion over the years with positive results.
There are lots of a/c filtration options out there.