I looked and looked for this topic but could not find it so I apologized if I missed it.

I turned on my AC in my 94 ford f250 and it made a squealing noise then I started to smell smoke or more like electrical burning. I turned off the AC and the squealing and burning stopped. I found that the compressor was the problem and after pulling the pulley and clutch assembly off I found that the coil had melted or got really really hot and smelled lie it had burned. My pulley and surpentine belt were still spinning fine so what happened? My AC had worked fine a few weeks before this.

I appreciate any ideas.

 

Welcome to FTE shamuski,
Ouch! It sounds like your compressor seized up. That's not good news.
No apology needed, that topic comes up in many different posts under a wide variety of headings.

Luckily, your 94 is (should be?) an R134a system. You're looking at a major repair to fix the AC system. If it makes you feel any better, My BILs 94 did the exact same thing on Tuesday. It's in my shop right now.

The melted compressor clutch coil is just a symptom, not the cause of the problem. The squealing you heard was the belt sliding around the non-turning compressor pulley. The smoke was from the burning rubber. Your compressor has been failing for some time and building up heat in the clutch which, in turn, melted the potting material in the clutch coil. After siting, the overheated compressor finally locked solid.
The melted coil is actually still working well. It engages the clutch when you turn on the AC, causing the belt to slip because the compressor and it's pulley won't turn.

This repair can potentially cost between $700 and $1800 at a retail shop. In my experience, $900-$1100 is the norm on a 90's Ford Truck with this failure.
The AC system is usually filled with debris from the failed compressor. This requires flushing or replacement of everything in the AC system refrigerant loop.

If you are competent and comfortable with doing repairs on your own vehicle, you can do much of the repair yourself. (it sounds like you probably are, because you disassembled the clutch to inspect it). How much you can do depends on the tools that you have available. One "must have" is access to a good supply of compressed air. The rest can be rented or purchased as needed.

I hope didn't scare you away.

 

Thanks, Im not too scared. I was just weighing the hassle of fixing nest to just purchasing a newer truck. Guess my mind is made up. Thanks for the info.