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97 Chevy Suburban rear AC not blowing as cold as the front.

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by Phassett, Aug 26, 2011.

  1. Phassett

    Phassett New Member

    I just had the system over hauled with all new rear lines and a new expansion valve. I also have a new condenser. The front blows really ice cold while the rear is cool at best. It has one compressor that runs the 2 independent AC's.

    What are the things that could cause this??? Everything was done 2 days ago so all should be good.
  2. DAREDEVIL

    DAREDEVIL New Member 1000 Posts

    if its really hot out , the rear AC looses a little thru the heat hitting the ruff !!!! but when u say AC blows real cold infront..I WANT THAT ONE ..lol
  3. Phassett

    Phassett New Member

    It is loosing more then a "Little" I mean there is a pretty big difference.
  4. vncj96

    vncj96 New Member 1000 Posts

    There still is a unit in the back so maybe something isnt functioning correct or the place that installed it screwed something up. Relly the only thing is to get it back to who replaced everything right away.
  5. janikphoto

    janikphoto New Member

    I think he meant to type roof. However, I don't think it's merely heat transfer from the roof. I bet the rear system needs to be cleaned/flushed. The orifice is the part that changes the freon from high pressure to low pressure and if it is clogged with gunk, it won't let the a/c get cold enough. This is assuming you've already checked the system and confirmed it isn't a leak or lack of coolant.

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