The unit is pretty darn old, and that's about all I can tell you. Once it actually gets cold around here, Ill see how it does. Its still in the 80's here in south Ga. We only use this unit in the winter time because its downstairs, and heat rises. It had one of those thick jackets around the compressor. Should I remove that? It hardly ever freezes here.Are you sure the load unit hasn't got some other problem that would cause it to draw more current than it should and maybe play havick on other components. Perhaps it has a shut off for hi heat.