Hot Air from A/C - monovalve? (pics included)

[Snibble]

Alright... I'm getting annoyed by my car's AC. Here's the deal.. it was converted to Freeze 12 (not by me) in the summer of 2002 or 2003. From what I read from the greats like Larry Bible, this will only last a few years before something is eaten away. Does this also affect cars that have been converted to Feeze 12?

I took my monovalve out(lost 2 screws doing so ) and examined it for damage. Didn't see any physical tears in the diaghram that many posts talk about.

Now here are the symptoms.

Sometimes I get cold air when I start the car. Its not super cold.. but just "cold". After 10 minutes of driving, I notice the "cold" becomes just regular air temp. Not hot, not cold.. just "regular". Once I park the car and try to start again, I just get HOT air. I feel it coming from all vents. So at this point I just turn it off. Other days I am not so lucky... I don't even get the "cold" air, but regular air temp air coming out of the vents.

Today, I took the monovalve out to check it out. Took pictures of it and hopefully some of you experts can tell me something from the pictures.

There is no leaks of any kind on the car... dry as a bone, and that includes the compressor.

As I am not knowledgable at all in the field of AC, please be as specific as possible if there's something that I should do.

monovalve



Disassembled monovalve


Bottom of monovalve


rubber diaghram moved down


side of monovalve


monovalve with me pulling down on it


closeup of the end of the monovalve