So my TT is going on 3 years old now, used several times a year, nothing crazy, and I am about to install my third 30 plug head. As I hold the plug in my hand, prongs facing me, the one on the left s...
2 things: a poor connection and drawing too much power. 30a cg sockets are often old and corroded. Try the 50a. At the house is also suspect if you're running air.
Next time try feeling the plug after a few minutes of running air. See if it's getting warm.. then hot.