The fridge is warm and freezer has frost build up on back wall.
I ran the diagnostic test through the control panel and it shows a defrost thermostat short. I also did a forced defrost and the fridge started cooling again. Would this indicate the defrost thermostat is bad or the defrost timer is bad?
You can test the thermostat with a multi-meter. It should be closed when it is cold. If open you will need this part.AP4009073
How ever if it is closed then you will need a new control.
AP6022400
Replacement parts for AMANA ABB2224DEB REF - BOTTOM MOUNTS | AppliancePartsPros.com
I have a similar problem. I’ve replaced both parts listed. Thoughts?