Thanks for the replies. I think it's unanimous.
I've been pulling the big fuse on the whole system during the
winter, but reconnecting everything a day or two before switching to
AC for the summer. I'll just keep doing it that way.
But based on what everyone says, it seems I was told wrong about
modern compressors not having heaters. Is that right? It made
sense because I thought they would figure out a way to save every
last KW of power, and doing with out a heater would be one obvious
possibility. But from the explanations, it seems a heater is really