This forum has helped me a lot in the last year. I intend to do a write up of my thermostat solutions to help others. Anyway....
I am in a condo building. Condenser just for my apartment on the roof, and fancoil in my closet. It is a 2 ton Bryant for my 1200 sqft apartment.
Anyway, when I run the AC, sometimes the outside temp might drop into the 60's, or maybe 50's at night. I am in Vermont so it is quite common to have 80;s during the day, and 60's or colder at night. I suffer from allergies so it is best to leave the AC on. Also outside noise sometimes makes it desirable to leave the AC on. I sometimes notice if I get up in the middle of the night, the AC is starting to freeze up. It basically makes a slight ticking noise. Not totally frozen, but starting. Only noticed this a couple times a year, but not sure if it is doing it more frequently since I don't always wake up. I think a rooftop AC might be more common to freeze up since it doesn't have the warmth of the ground to keep it warm. Just a guess though.
My question: Is it bad to run the system like this? Should I install a low ambient kit?? Other than the ability to run the AC in cold weather, does the low ambient kit buy me anything?? Longer life, especially given the long run from fan coil to roof (2 floors up), or does it matter??
Is the low ambient kit simply a heater?? Let me know what you guys think.