Researched appropriate YouTube video; followed suggested testing procedures, eliminated thermistor/defrost heater/ possibilities with a continuity test using multimeter. Sensor test is difficult and frustrating. Skipped that and continued voltage tests, using same multimeter, tested resistance across condenser windings, tested good. Plugged power to the unit, checked for voltage at the input to the condensor, no voltage. Process of elimination indicated bad motherboard. Ordered new motherboard online. Using AppliancPartsPros websight ordering was simple. Received the new motherboard within a week, checked to see that it looked like the original, it didn't,he new board had more connections but with closer inspection of the board all necessary connections were provided for my unit. Reading the installation instructions thoroughly and in its entirity, is a must. The notes provided explained everything. After making the appropriate connections, I applied power to the unit and the condensor started, indicating that the new board was functioning appropriately. Within 24 hours the frig was working properly.
**Note: When removing old motherboard pay close attention to the mounting pegs, observing that there is a locking flang that needs to be depressed in order to make the removal easy as well as insuring that the pegs aren't damaged. This requires dedicated patience and a steady hand along with some needle nose pliers. These pegs will be reused to secure the new board to the unit.