This is a newish Maytag jazz board refrigerator presenting with a warm FF and cold FZ. This was not your typical defrost failure. The failure here was the evaporator fan was not running. I troubleshot the problem without disassembling the freezer-- did it all from the jazz board.
Even though this is a modern, computer-controlled refrigerator, what you're about to see are actually old skool troubleshooting techniques that have been largely lost in the appliance repair trade today:
- reading the schematic and understanding from it how the circuit is supposed to work
- knowing where to measure with my multimeter
- properly interpreting my meter readings to draw the correct conclusion about the real problem
- "jumping the switch"
There were no visible failures or burn marks on this board. I had to deduce the cause of the problem from my meter readings and using my jumper wire to prove my conclusions. Come with me now on a journey of Total Appliance Enlightenment...
If you can't quite follow or understand what I did in the video, fear not: You can learn how to troubleshoot like this, too! We love teaching electric circuit troubleshooting to people who want to learn this stuff. If you want to earn more money and have greater job satisfaction, enroll now in our Fundamentals of Appliance Repair training course.
(PCM - Parts Changing Monkey)