In case you need to know

I recently posted about my duo therm heat pump/ACs quickly cycling on and off and staying off for hours at a time. The shop was stumped after several attempts to fix. A mobile mechanic suggested sequentially cutting off lights and not using various outlets to see if perhaps a partially bad ground might be the culprit. Yep, light over the sink. Left it off and problems went away. Light worked perfectly by the way Hope this info may be helpful to others