Why does my ac freeze up - Danby Heating & Cooling

Hello, air conditioners will freeze either due to low airflow.....such as dirty filter, dirty evaporator coil, weak or not running blower motor. Also, a low refrigerant charge can cause the unit to freeze up.

Quite true >air conditioners will freeze due to low airflow.....such as dirty filter, dirty evaporator coil, weak or not running blower motor.
Only one thing to add. Most evaporator (inside-cold air) fans are squirrel cage types. This type is adversely affected by dirt. A very small amount of dirt on the "cage" can cause a huge reduction in airflow leading to freeze up. In room air conditioners the evaporator fan is almost always hard to get to for cleaning.
Solution 1. Pull unit out, take outside and clean evaporator fan with coil cleaner or soap solution. Keep water out of thermostat compartment and away from blower motor. Rinse repeatedly until clean. Be careful not to damage any Styrofoam under the evaporator and around the squirrel cage.
Solution 2. Pull unit, take outside and remove evaporator fan. That's the squirrel cage right behind the coils that get cold. A little or a lot of dis-assembly may be required. You may need "long reach" allen wrenches and penetrating oil to get the squirrel cage hub set screw loose. If you have not done this before expect to spend a lot of time.