Thank you for your suggestions.

My A/C doesn't have a temperature control, but it does have a thermostat and a dial control. I could just put it on a low setting and "energy saver" mode. It's actually a combo heater/air conditioner. The last time I went back east (during the winter), I set the thermostat low and left the heater on, just so it would come on if the weather turned very cold.

Liz