We had that happen once on our last pop up. Left it on cold and went out all day. Came back and the ac was making a funny noise. I hurried up and got inside and shut it off for a little but. It started to drip from the inside if the ac. It was mid 90's that day. Turned it back on later and it was fine so I assume it just froze up. We always shut the ac of when we leave now. Not like it takes a long time to cool a pop up.
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2014 Rockwood Premier 2514G
2010 Ford F150 Lariat
Nights Camped in 2016-33
2015-22, 2014-22, 2013-2