Condenser was encased in solid block of ice due to automatic defrost not working. Replaced thermostat and ADC control board. Working fine now. Most tedious part was using a heat gun to melt all the ice off the condenser coils.
You will need a couple small wire nuts to splice the new thermostat into the existing harness (they are not included).
Service tech wanted over $400 to repair, fixed it myself for half that. Thanks !