[Richard and Rhonda]

Tuga,

The control boxes are the little silver boxes that contain the circuit boards. There are connections in those boxes that connect to the incoming AC power and to the outgoing AC power to the compressors and fan motors.

It is my theory, based on the loose connections I found and reported by others, that the chronic burnout of compressors in the basement units is partly caused by the loose power connections to the compressor. Loose connections drops voltage, amperage goes up, motor burns up.