Sorry for the late reply after a few hours of diagnosing I decided to replace the rear auxiliary expansion valve and rear auxiliary evaporator core after installing I refilled A/C Freon and it all works as should both front and rear are both cold and working great.
I have a 2012 Ford Expedition el xlt for starters this truck has been a horrible a pain in the a** regarding the a/c however usually I had problems with the front a/c not blowing cold but all that was resolved but recently last month I noticed my rear a/c vents will blow hot when turned to hot...
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