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tex_wardfan's avatar
tex_wardfan
Explorer
May 13, 2016

Air conditioner freezing up question

My trailer has an airxcel 48000 series roof top unit. My question is have any of you, who have this unit, had any problems with the evaporator icing up? I did not need to use the unit on our first trip but I'm sure I will have to on the next. The guy who made our trailer ready and gave us the walk through said we should always run the unit at max cool to keep it from icing up. I read the owners manual for the unit and this doesn't seem correct. It seems like that would make it ice up. Any thoughts on this would be appreciated.

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  • fla-gypsy's avatar
    fla-gypsy
    Explorer
    May 13, 2016
    Old-Biscuit wrote:
    MAX COOL.....

    Just means uses High Fan Speed vs Low Fan Speed

    Low air flow
    Dirty evap coil
    Dirty return filter
    High Humidity

    All conditions that will cause a perfectly functioning A/C Unit to Ice Up


    X2, clean filter, coils and run fan on high. If that doesn't correct it seek professional help
  • DownTheAvenue's avatar
    DownTheAvenue
    Explorer
    May 13, 2016
    Old-Biscuit wrote:
    MAX COOL.....

    Just means uses High Fan Speed vs Low Fan Speed

    Low air flow
    Dirty evap coil
    Dirty return filter
    High Humidity

    All conditions that will cause a perfectly functioning A/C Unit to Ice Up


    The #1 reason A/C units ice up is low on freon!
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    May 13, 2016
    MAX COOL.....

    Just means uses High Fan Speed vs Low Fan Speed

    Low air flow
    Dirty evap coil
    Dirty return filter
    High Humidity

    All conditions that will cause a perfectly functioning A/C Unit to Ice Up
  • bsinmich's avatar
    bsinmich
    Explorer
    May 13, 2016
    The compressor runs at only one speed and gets the coils cold. Moving more air over them will keep the coils less likely to ice up. In high humidity this can be a problem but low humidity it may not be a problem on any setting.

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