Check for a loose connection at the CB that is heating the CB and fooling it into thinking there is too much current. If there are numbers on the CB, post them.
Probably not. You can visually inspect all associated wiring/connections on both ends (panel and unit) but you will need at leat an amp meter to do any electrical testing.Before I go and spend a ton of money on a professional, is there anything that can be done by an "experienced-amateur"?
Filing contacts is not a very good idea. It removes the thin copper or similar precious metal from the contact mating surface. Yes, for a temporary fix. I have found that a simple pencil eraser does a good job and does not remove as much precious metal. You would very surprised at how well an eraser works. It will not repair deep pitted contacts. But is excellent for surface cleaning. :thumbsup:I just went through a similar problem with my capacitor start table saw motor.
The start contacts inside the motor had a carbon buildup on them.
I cleaned them up by filing the carbon off and resolved the problem.