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Old 04-06-2020, 01:35 PM   #1
Max20
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Air Conditioner

I recently purchased a Montana 3791rd with whisper quiet air conditioners.
I like to sleep in the cold, so I turned the bedroom air down to 60. It ran for 10-15 minutes then shut off. It did not come back on the rest of the night, even after I turned it down to 55. The next morning I put thermostat to 70 and it ran like a champ all day. What do you think?
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Old 04-06-2020, 02:01 PM   #2
JRTJH
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Possibly low air flow, limited removal of condensation on the evaporator coils, causing ice formation ??? There is a "freeze detector plug" located inside the unit. It may have fallen out of the evaporator coils or it may be incorrectly positioned... If it's not the freeze detector, it may be a low Freon charge. Or, it may be something entirely unrelated to any of these. They are the most common, but certainly not the only possible problems.

If it's a new trailer and it becomes a problem, or if you can't access the freeze detector and the problem continues even with the thermostat fan setting on HIGH, I'd suggest contacting the dealer to have it repaired under warranty.

With the new trailers, Dometic warrants the air conditioner for 2 years, the manufacturer of the "In-Command system" warrants their "contribution to HVAC" differently from the Dometic warranty" and Keystone warrants all of it for the first year only.... So, for 12 months from purchase, you can get it fixed with little "warranty hassle"... After that 12 months, you can still get it repaired under the "component manufacturer's warranty". But you may run into a "we're not responsible, they are" situation between whose component caused the issue.... I wouldn't wait, if it is a problem, get the dealer involved.
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Old 04-06-2020, 05:23 PM   #3
chuckster57
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What year is your unit? Access to the coils and checking the freeze sensor will require getting on the roof and taking off the cover. If it’s under warranty I would let the dealer do it.
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