Newly purchased used pop up. AC runs great for about 5 minutes then the breaker flips. 122 volts coming in. Standard OEM cord. Nothing else running. Original AC unit on a 2002. AC cools great for 5 mi...
You need to troubleshoot with a clamp-on multimeter. This guessing and could be's will cost you $$. You must first find out what amperage the unit is pulling while running. It's either going to be over 15 amps or under. Common sense where to go from there.