Finally, my question. Is this true? Are we risking a freeze up if we run the bedroom A/C on low? Didn't want to try it until I get some wisdom from you fine folks.
No harm in trying it. I'm going to guess your odds of freeze up are less than 50%. Running on medium or high greatly diminishes the chances.
I've had three roof airs now. Two Dometic Penguins and one Coleman. My latest Penguin 15K heat pump will just start to freeze (slight diminished airflow) before it is detected and the compressor shuts off. The former two would run on low without freezing, although one of them had a tendency to drip some water into the RV.