Will an Undersized Ac Unit Freeze up?

The evaporator coil in an undersized unit may overcompensate for its work load by lowering the temperature below freezing, which will lead to a buildup of ice. In addition to freezing up, an undersized unit may run constantly, but fail to cool your home to the temperature on which the thermostat is set.

What happens if my AC unit is undersized?

A properly sized unit will kick on and off periodically to control the temperature. Undersized air conditioners will struggle to ever get the room cool enough and therefore will fail to go through healthy on and off cycles. This extra wear and tear will lessen the life of your ac and cost you more in repairs.

How can I help my undersized AC unit?

A better solution is to get some variation of a two-stage air conditioner. Instead of a compressor that's either off or on, these have a compressor that can run at two speeds. Most of the time, it runs at the lower speed and behaves like an AC that is undersized, runs longer, and dehumidifies well.