I added rear ac to my 94 Dodge B250. Subsequently, almost every component has been replaced: evaporator & expansion valve, compressor and I had the condenser done just to make it complete.

My problem is that the unit used to cool to 42 degrees at the front while driving in town (SW Florida). Now, it won't go below 60. The ac guy says 60 is considered acceptable, but if he had to drive it, he wouldn't accept it.

The rear ac works, it runs about 8 degrees warmer than the front but we added the rear air for comfort around town.

If anyone has any pointers as to next steps to get it to cool at lower speeds please let me know. By the way, around town means 45 mph with traffic lights spaced about a mile apart, so its not really stop & go.

I added rear ac to my 94 Dodge B250. Subsequently, almost every component has been replaced: evaporator & expansion valve, compressor and I had the condenser done just to make it complete.

My problem is that the unit used to cool to 42 degrees at the front while driving in town (SW Florida). Now, it won't go below 60. The ac guy says 60 is considered acceptable, but if he had to drive it, he wouldn't accept it.

The rear ac works, it runs about 8 degrees warmer than the front but we added the rear air for comfort around town.

If anyone has any pointers as to next steps to get it to cool at lower speeds please let me know. By the way, around town means 45 mph with traffic lights spaced about a mile apart, so its not really stop & go.
Well, maybe...just maybe a different pulley on the compressor would help. But if the AC used to work at 42 and now will only put out 60 something has obviously changed.
And that is what should be focused on IMO. Charge OK? Compressor OK? etc.

Different as in diameter? AC mechanic #1 put a different expansion valve on as Dodge has different parts for vans w/rear ac. The rear unit has its own expansion valve as well. Compressor is new (rebuilt) and charge is holding fine. Everything is sweating under the hood where it should. I don't want to put much more into it, but I'm thinking that an electric fan on the condensor may be my last resort. My front drive Lumina APV had one and when it went out, so did all hope of the ac cooling at slow speeds. (Didn't do much for the engine temp either). Thanks for your help.

Different as in diameter? AC mechanic #1 put a different expansion valve on as Dodge has different parts for vans w/rear ac. The rear unit has its own expansion valve as well. Compressor is new (rebuilt) and charge is holding fine. Everything is sweating under the hood where it should. I don't want to put much more into it, but I'm thinking that an electric fan on the condensor may be my last resort. My front drive Lumina APV had one and when it went out, so did all hope of the ac cooling at slow speeds. (Didn't do much for the engine temp either). Thanks for your help.
With the cost of mechanical repairs these days, I don't blame you for not wanting to spend much more. You can quickly rack up some pretty horrendous bills and get no where with a problem like this.
Yes, different diameter to make the pulley turn faster at lower engine speed. You might ask a mechanic about it, it might just help.
I think you are on the right track thinking about the electric fan. Especially because of the restrictive underhood space on a Van. Only other question I have is did the Receiver/Dryer get changed when all of this work took place? A dry charge is needed for efficiency...so I have been told anyway.
Good luck!

Thanks for the clarification on the pulley. Yes, the receiver/dryer was replaced in July when they did the evaporator and again in August when AC Mechanic #2 replaced the compressor. Horrendous has been reached and passed. Thanks again.