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Thread: A/C Slab

  1. #1
    DIY Junior Member burkhamerk's Avatar
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    Default A/C Slab

    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. #2
    Test, Don't Guess! cacher_chick's Avatar
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    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.

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
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    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.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  4. #4
    DIYer, not in the trades LLigetfa's Avatar
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    I would just lift the slab back up to level and shove some sand under it.

  5. #5
    DIY Junior Member tempritespokane's Avatar
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    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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