If the air never gets cold, even on normal around-town driving, I'd say the first culprit would be freon levels.
Last week I had the TSB performed, but that was because the car would run fine in the beginning, but after several non-stop driving hours in hot, humid weather, the evaporator would freeze up and you'd get no air at all though the vents but the fan would still be running.
One thing I have noticed is the A/C does seem to blow colder after the TSB was applied even though the dealership didn't touch anything else.
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