I finally scheduled my oil change with my dealer,
Sunnyside Mitsubishi. I asked that they also look at the alignment and check the refrigerant charge. I took it in on Friday August 12. Speck had a little over 5,000 miles on the odometer.
The check done on the AC was very minimal. All they did was check the temperature of the air at the vents.
The alignment check showed the rear axle is out of specs for camber.
The mechanic made slight adjustments to both front wheels using a Hunter alignment machine. The numbers in the readout picture show his work.
The service manager called back later that day to tell me a new rear axle assembly has been ordered for my car.
When I asked about the AC charge, he said that is the first check they conduct. If the air coming out is cold, there is no problem to address.
Fair enough, I suppose. Here's hoping the new axle has better alignment numbers.