Fred,
If I understand correctly, this failure happened right after you worked on the electrical panel. Could it be that a wire was inadvertently pulled? Is there a problem with the SMX controller? Also, does this type of compressor use a start capacitor that might have had its wire disconnected, causing it to try starting without the necessary boost?
It’s odd that the only changes you made were tilting down the breaker panel, cleaning the filter, and installing the kick heater, yet now the A/C compressor isn’t functioning.
Jim,
It worked great after I closed the panel and buttoned everything up. It was only after I shut it down and restarted that it died.