You AC should be cooling more effectively than that on MaxAC − I’d take it back and get the pressure checked to ensure you don’t have a leak. Something is funny about your problem though as MaxAC should work even with a bad blend door. MaxAC opens the recirculating air damper, shuts off the flow to the heater core and cranks the AC so you should get full cooling. If you look on this picture below you will see how it all is setup − the blend door is in the middle and controls air flow around the heater core after the AC evaporator. If the heater core is off then you should still get full cooling even if the blend door is wonky.
You need to confirm that you indeed do have the blend door issue before doing much further. Google it a bit for more information as I think you can actually see the problem behind the glove box to confirm it before going ahead. That blend door fix is well documented and should work − not sure for how long though.
Still having problems!
Adding to my previous posts… I have only recently noticed the ineffectiveness of my A/C as temperatures climb into the upper 80’s to 90’s. The A/C is fine if the temperture is 75 or lower, but at higher outside temps, the A/C does not provide sufficient cooling and i leave my car sweatier than when I entered. The Max A/C setting does not put out cold air, just mild air (about 5 degrees cooler than just rolling down the windows and letting outside air in)

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