Air conditioners primary purpous is to dry the air, they do this by making a cold surface for water vapor in the air to condense onto if it gets too cold things freeze. There is to my knowlage no AC that can run in reverse (even if there was, that is not how homes are heated).
If you need to both dry and heat air you will need to operate both an AC and a furnace or electric heater which means the AC can still freeze independent of the heater if left running too long.
Latest Answers