Probably not the OP"s issue but I'll throw this out for others with a coil freeze issue. Some other causes are:
excessively dirty filter, the foam filter in the return air grill can easily get clogged in dusty campgrounds. This reduces airflow and subsequent freeze up. Same with a duct restriction, if air can't get out quick enough the resulting low airflow can cause a freeze up.
leaving the door open. The unit cannot cool off your entire campsite.
Too much humidity. If a family of 5 are bathing inside and momma's boiling spaghetti without a vent open and a fan blowing the moisture out the air conditioner can't handle that much moisture.
Setting the t'stat very low. Some folks (like my DW) don't understand that setting the t'stat well beyond the desired temp does NOT make it cool or heat any faster. If you set the temp to 60 and walk away to "let it cool down" for an extended time you'll most likely return to a cold, quiet, meat locker environment.
Improper install of the unit. If the divider between intake and output sides of the unit isn't installed or sealed properly than the cold air exiting the unit get's sucked back in and cooled again (a circular path or "loop in the exchanged air". The room temp is never tempered but the AC is very cold.
improper refrigerant charge. A low charge can cause the coils to freeze. The "freeze sensor" should shut the unit off if it's properly installed.
Hope this helps someone with "the same problem" have other directions to look after they find the freeze sensor is in place.
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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