GE Refrigerator DFE29JSDASS Main Circuit Board (197D8503G501) Blinking Green Light Diagnosis

Please make sure to click on General above and select the correct appliance type first.

Brand: GE
Model Number: DFE29JSDASS
Main Symptom: Defrost System failure
What happens & when: Frost Build up in the coils in the back eventually stopping air flow

Error Code (if any):
Parts or tests already tried: All heating elements replaced, Heater, Thermistor, Thermostat and heater harness.
Photos / video link:

A blinking green light on the control board usually indicates the board is functioning properly, think of it as kind of like a heartbeat. I have attached a mini manual to help you perform some diagnostics on your unit

gye22hmkdes 31-51932.pdf (1.7 MB)

31-9227.pdf (6.3 MB)

Thank you so much—looking into it.