The terminal strip in my control box has spring-tabs holding the wires, rather than screw terminals. That surprised me, never having seen that type of terminal used with 110vAC.
I had been having intermittent problems with my G2000. After calling Girard and received advice on removing the current limiter box from the circuit. The intermittent problems continued.
Then I discovered something else: One of the wires was not securely fastened, sort of pressed in. (Note the third tab from the top in the picture. The white "T" which controls the spring terminalis all the way to the left, as if it wasn't holding its wire. Note the blue one. It wasn't.) I removed and re-connected wire; no problems so far.
Girard also advised that the strain-relief retaining nuts at the bottom of the box should be tightened to avoid cables from pulling on the wires.
Tech said "finger tight" is enough, no wrench necessary.