A/C Slab

Discussion in 'HVAC Heating & Cooling' started by burkhamerk, Apr 16, 2011.

  1. burkhamerk

    burkhamerk New Member

    Apr 16, 2011
    U.S. Army Civilian Employee
    Slab under A/C Unit degrading and rear of slab sinking. A/C unit now sits at angle with rear of unit lower than front. How severe is this problem? Wondering if I should disconnect/move unit and pour a new slab.
  2. cacher_chick

    cacher_chick Test, Don't Guess!

    Jan 5, 2008
    Test, Don't Guess!
    Land of Cheese
    Most A/C places do not pour cement, they just bring in a prefabricated 3x3 slab that is available from most supply houses.

    If the condenser gets too far out of level it can effect the oil flow through the system. How much is "too much" is speculative.
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  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    If it sinks too far, it might kink or stress the coolant lines. That can be really bad. Otherwise, close to level should be okay...hard to say how much off will cause problems.
  5. LLigetfa

    LLigetfa DIYer, not in the trades

    Feb 6, 2011
    NW Ontario, Canada
    I would just lift the slab back up to level and shove some sand under it.
  6. tempritespokane

    tempritespokane New Member

    May 3, 2011
    Spokane, Washington
    If the slab in not level it also can make your unit run less efficiently. In the long run it can run up your electric bill.
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