Thread Number: 65926  /  Tag: Vintage Dishwashers
Kitchenaid KUDA22ST3 pump repair 		[Down to Last]

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Post# 884825   6/13/2016 at 00:35 (2,873 days old) by Jpoldoian ()        

The drain cycle suddenly stopped but wash cycle worked fine. I stepped through handy manual cycles as shown in maintenance guide pamphlet. The drain relay closure was audible but the motor would not start.

I measured resistance of motor's drain winding and it was fine. The motor moved freely in both directions without any resistance so there were no obstacles in pump. I learned that many dishwashers run the motor in one direction to wash and opposite direction to drain. I felt something was wrong with the circuit board so removed it for close inspection.

By twisting tabs, you can carefully unfold the dual circuit board. There is a reversing relay, looks like SPDT, to control wash vs. drain. Upon careful inspection, I noticed one of the relay terminals had a cold solder joint and it caused some carbon at the terminal. A quick ohmmeter check verified the open connection, but you must have sharp probes because the circuit board has a protective film, fairly hard to penetrate. I re-soldered the bad connection, re-assembled all wiring and the dishwasher drained perfectly.

Problem solved. I saved the money needed for a new machine, plus the labor for installation !




Post# 884830 , Reply# 1   6/13/2016 at 01:54 (2,873 days old) by rp2813 (Sannazay)        
Nice work!

rp2813's profile picture

This is the kind of news we all like to hear!

 

Your 23 series was well worth repairing.

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