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A local Animal Hospital has had an "inadequate cooling" problem ever since the AC was installed in 1987. My dog , Freon, needed a new Vet and the Dr. needed a new AC guy. Freon is fine and the AC is in recovery. The " V " coil ( upside down "A" coil has the return air going into just one side of the evap coil, bypassing the other of the coil.The Dr. just smiled and asked if it could be fixed, and I just smiled also.