The converter fan cycling on/off is normal whenever you are connected to shore power (even if your use/store switch is set to store).
I've been leaving my frig on 1. It will read 31 degrees on the frig screen, but I don't think it's actually that cold in the frig (based on a separate thermometer I keep in the frig).
If I have a couple of weeks between trips I'll leave the frig on, but I turn the temp setting up to 3 or 4 with jugs of water inside.
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