The answer to 'evaporator coil short cycling' is that it is a common issue where the evaporator coil in your HVAC system turns on and off rapidly, rather than running continuously. This can be caused by a variety of factors, including low refrigerant levels, a dirty air filter, or a problem with the thermostat or control board.
Some common symptoms of evaporator coil short cycling include uneven cooling, high energy bills, and the system turning on and off frequently. To address this issue, you may need to check and replace the air filter, have a professional check the refrigerant levels, or troubleshoot the thermostat or control board. In some cases, the evaporator coil itself may need to be replaced.