Forum Discussion

JMCC730248's avatar
JMCC730248
Explorer
Jan 30, 2014

LEAKS question

I have been having a leak thru my air conditioner during hard rains;is the common repair for this to replace the gasket between the ac and the roof? and how hard is it to remove the ac? or is eterna bond the answer? Thanks, Tom
  • DON'T USE caulking or Eternabond! Do follow directions and replace the FOAM seal that is between the AC unit and the roof of the RV. As stated..snug down the bolts holding the Roof AC to the RV first to see if that takes care of the problem.
  • As suggested......tighten the 4 hold down bolts------just 'snug'

    You have to remove the whole ceiling grille. Usually 6 screws. 1 on each corner and then 2 in cross bar under air filter cover.
    The 4 hold down bolts are in the corners.
    They secure the whole A/C unit to the roof and compress the roof gasket.
    They can get loose.

    The roof gasket is 1" thick when new and gets compressed to 1/2" to seal.
    Over-compression can warp the gasket and also block off the evap coil drip pan drain holes.......pan ends up to close to roof and the drip pan can't drain condensation from evap coil (which can cause the built up water to get carried over by blower and leak inside rig from ceiling grille when you run it come summer.)

    Check the bolts...snug them up.
    If it continues to leak rain water then a new gasket will be needed.
    You have to disconnect electrical to the A/C unit (should be able to do that thru opening where air filter is.
    Undo the 4 hold down bolts and then lift the whole A/C unit up off/out of roof opening. Remove the old gasket, install new, set A/C back into roof opening (check that gasket is properly aligned)
    Install and tighten hold down bolts (snug)...connect electrical wiring.

    Then check hold down bolts again after a couple of trips.

    Good Luck!......Hope it's just loose bolts
  • I had a problem of a leak and found it was coming in around tv cable.
  • First, try tightening down the hold down screws a bit. Be careful to only tighten down evenly and just a bit more. If that does not cure the problem, then a new gasket is the only solution.