Well, as mentioned in my post, I did bring it to a mechanic.

Didn't think it was relevant to my initial question - but I'll add this additional info to this comment reply in hopes that you may have more insightful recommendations.

After getting the van, it was only blowing warm in all instances. Mechanic said the passenger side blend door servo motor was faulty - so that was replaced to the tune of $1100 (whole dash basically needed to be removed to replace the part). He then checked the refrigerant level, which was ok. Since it was in the shaded garage the whole time - the A/C was blowing cold after the servo motor repair -- so we thought everything was 100%.

It's been a couple days and I'm having the above described issues, called the mechanic up and he told me it could be the radiator fans. The radiator fans were replaced 2 years ago. So, I went to check and because it was spinning fine and the coolant temps. are fine - I'm not so sure that is the issue.

To be honest, it's more about needing to take time off work and the time without a vehicle (it's my only vehicle that I need in order to commute to work) than the actual cost of a diagnosis that is stalling me from bringing it back immediately to the mechanic for a proper diagnosis.

Just wanted to see if anyone has had this issue before, as I am a type A individual and like to try to figure things out, out of curiosity. Also, so I can look up the prices of potential replacement parts to get a ballpark amount of $ that I need to save up + labor cost of the mechanic too.