Dehumidified Defrost needed?

Is Lewiston all that humid? Up in the "N end" we have days of rain, slushy snow, etc, of high humidity, were if not dehumidified, you at least need outside ventilation. We got by most of my life without. I don't know when the first was I had, perhaps my 97 Olds Cutlass? Nothing before that had it. Nothing in the 70's that I know of.

If the AC system is not designed for this function at the outset, you are wasting your time and may damage the AC. Operating a universal AC in cold weather without that feature in mind is a recipe for liquid slugging the compressor.