Yes, the A/C only recirculates cabin air. The suction filter is reachable inside the camper and is something you'll want to maintain.
I think the low/high settings affect only the fan speed. Instead of low & high, it should be labeled "noisy" and "extra noisy"
It is the blue/red temperature dial that affects how often the compressor kicks on and off.
I've been fine just running low cool but starting with turning the dial to the farthest blue setting. When the camper has cooled off, I'll turn back the dial. Otherwise it gets too cold (and I'm in TX!).....maybe because it's a new unit.
-John
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2008 TM3023
TV#1: 2008 Chrysler Town & Country (3.8L Touring w/ tow package, WDH) (*retired 2018*)
TV#2: 2015 Nissan Pathfinder (w/ tow package, WDH)
TV#3: 2018 Ford F150 (w/ tow package, WDH)
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