Lance onboard Onan running issues

Mine started acting up on those really hot days we had back on July 4th weekend on the island,it started to act up about an hour in and was really bogging when the compressor kicked on, I think it was overheating. I ended up shutting it off and leaving early that weekend. Now that I think back the little bit of wind that was there had shifted from S to N and was blowing at the front of the truck so that probably did not help the situation but it did help keep my truck cooler on the drive back to the air pumps.

I prepped my camper for the same reason, thank goodness we didn't have to use it. But my onan fired right up and it was raining out so I don't really have an answer to the humidity question. Maybe yours is running lean or has a port partially blocked?