In this video, I demonstrate some very Non-PCM (parts changing money) techniques for troubleshooting an inoperative evaporator fan problem in a Maytag (jazz board) refrigerator. To accurately diagnose the voltage reading on my meter on this one I needed to:
* use the schematic to see how the board was supposed to function in the evap fan motor circuit
* distinguish whether I was measuring voltage or voltage drop on my meter to identify a suspected open switch
* know how to use a jumper wire to jump out the suspected open "switch" and prove my conclusions
* know how input impedance on my meter in LoZ vs VAC affects my circuit voltage measurements
* understand the electrical concept of "loads in series".
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.
The sad fact is that many people doing "professional" appliance repair in the US today are completely unable to do this type of troubleshooting and would have replaced the evaporator fan only to find that didn't fix the problem. They are the Parts Changing Monkeys (PCMs) who are the scourge of our trade.
But the good news is that ignorance is 100% curable with training! The problem is that for many of these PCMs, laziness or arrogance gets in the way and prevents them from learning these essential troubleshooting skills.
In the past 5 years, we have trained over 1500 men and women on how to troubleshoot and think like real technicians making them top notch techs in the field, earning superior income, running profitable businesses, and setting an example for others. We are bringing back the long lost art of troubleshooting to the appliance repair trade. Learn more at http://mastersamuraitech.com