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Old 06-03-2018, 09:31 AM   #4
JRTJH
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Join Date: Mar 2011
Location: Gaylord
Posts: 26,846
The dealer is correct about running the A/C on low in a humid climate. The freeze detector can be mounted a little lower in the grates to compensate some, but ultimately, the A/C fan can't force enough air across the cooling grid to remove all the moisture and it will eventually "frost up" just like a conventional refrigerator/freezer" and need defrosting.

The solution: Run the A/C on high fan when in south Florida and it's raining outside. We found (in south Louisiana and south Texas) that at night when we weren't opening/closing the trailer door, the A/C could operate on low fan without freezing up, but during the day when we were opening the door to allow moisture into the trailer or showering which adds large amounts of water into the air, or when the humidity was excessively high, we'd almost always have icing occur when trying to run the A/C on low fan.
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