wMy wife and I were getting ready for bed when the fan in the air handler turned off. We normally keep the fan running all night so this was very odd. After that happened, the air handler and the outside unit would not respond to the thermostat. I opened up the air handler and nothing looked out of place and none of the electronics looked like they went bad ie bulging capacitors. I also checked the breakers and drain line which both looked fine. Any ideas as to what could have happened? I'm in Florida and it's been cold lately but I doubt that has anything to do with it.