Question about Kenmore HE2 Plus Front Load Washer
I have already replaced the door latch mechanism because when the diagnostic test is run The door latches and the clean washer light comes on. I have checked the connectors on the ccu and all seem tight. What is the next step?
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Posted on Jan 02, 2017
SOURCE: I have a Kenmore HE2
Let's focus first on error codes F22 and F26. Error code F22 is door lock fault and it flashes when the door lock fails to activate after 6 attempts while F26 flashes when the door switch is opened for more than 5 seconds while the door is locked or when the door is not opened after 3 consecutive cycles. Since you cannot do 3 consecutive cycles without opening the door, this may indicate that the door switch contacts are welded together. But both error codes may also indicate a malfunctioning CCU or any other component such as the motor controller unit (MCU).
Disconnect power then start troubleshooting the machine by disconnecting the MCU wire harnesses (MI3 and MS2) from the CCU then reconnect power and start the machine. If error codes F22 and F26 go away, then the MCU must be the culprit, replace it. If the error codes do not go away, disconnect power then test the continuity of the terminals of door switch harness DS2 both with the door open and close. It must have continuity, if the door lock and switch assembly is good, when the door is close and none when the door is open. Also test the continuity between the terminals of connector DS2 on the CCU and it should read open.
Proceed with the troubleshooting of the door lock switch and solenoids if the door switch contact is open when the door is open and close when the door is close. Disconnect power then disconnect the door lock switch harness from connector DLS2 on the CCU. Jump a wire between the terminals of DLS2 on the CCU then close the door firmly. Reconnect power then start the machine.
Post back the result of the tests and your observations about the behavior of the machine as you do the tests. It will help determine which part is causing the problem.
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Posted on Nov 03, 2010
This appears to be a problem with the MCU and not the CCU as what has already been found. First, make sure the serial communication connection between the MCU and the CCU is intact, clean, and snug fit. But it seems that you have done all that. The one and simple way to determine whether it is the MCU or CCU is disconnecting the serial communication connection between the two then starting the machine or running the diagnostic test.
The problem is indeed the MCU if the machine seems to work fine with the MCU disconnected except for motor powered functions or the diagnostic test progresses successfully but eventually flashes F28 code (or any other code pertaining to a motor or MCU problem) after the dispenser motor, dispenser contact, hot water inlet valve, and pressure switch test or when the test enters the MCU and motor tests. Replace the MCU then. The problem is the CCU or both if the machine still behaves the same after the MCU is disconnected. Replace the CCU then the MCU if the machine behaves the same after the CCU is replaced. This troubleshooting technique has worked for me all the times the symptoms are like yours and it turned out to be the MCU.
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Posted on Aug 13, 2011
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