Solenoid / converter issue? Trouble with battery disconnect

Chris Bryant wrote:
I would disconnect the battery first, and I would sure try cleaning it. You basically have 2 contacts (the inside ends of the two large studs), and a large washer to clean- you can even just flip the washer if it is burned.
There is a spring inside, though not a strong one.

This seems likely. If the solenoid itself is getting warm, a burnt contact inside can make a higher resistance connection, leading to a number of problems, including heat.

Good advice, let us know how you make out.