Guys.....
I had the same problem last summer. When stuck in traffic, the engine would start getting pretty hot and the A/C would only blow hot, disgusting, stinky air in my face.....
Someone suggested to "pressure wash" the condenser's fins with water and guess what???? It never did this again! The A/C works just fine since then.
Dirt and bugs really reduce the efficiency of the condenser.
It was REALLY a cheap fix....
Maybe you guys should try this first before you start giving money away
Let me know !
Joe 90