Question about Maytag Washing Machines
The manual states if there's a voltage present replace the MCU if not replace the CCU.
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Posted on Jan 02, 2017
First of all, make sure you unplug the washer before making any measures, and make sure you unplug any connectors from the CCU, so you aren't reading parallel paths. Isolate the components you wish to test from the CCU or you may get inaccurate readings.
The reading across the heating element terminal should read 15 ohms. Make sure you aren't grounding your probe against the case, or you will get improper readings.
The NTC will read approximately what you have at room temperature. Was the connector plugged in before you began troubleshooting? A common problem is the connector falling off and generating the error code.
As far as the connector plug on the CCU is concerned, plug layouts can differ between models. Make sure you have the correct connector plug to the NTC. You may have to hand over hand it to find it. Unplug the connector at the CCU and leave it plugged in to the NTC. Perform a resistance check across the PLUG terminals. You should get the same readings as you mentioned before if the plug and wires are good. This not checks the resistance of the NTC, but also proves continuity of the wires.
Doublecheck your readings and let me know what you have. I would like to rule out a CCU problem. It is not common for this error code. I hope this helps you.
Posted on Sep 05, 2008
it because you change cycles in the wash mode,,over reset...all fixes accept reset unplug .needs technician...if you fell you can do this repost question,,as replacing motor control unit
Posted on Dec 26, 2008
I had a variety of error codes show up on my duet, and I'm not sure but I seem to recall a 31, but the most constant was 02. I took off the front cover, pulled the white plug out from the unit, put a bucket under it, unscrewed it and drained it. It may be the MCU is having problems because the washer got plugged up.
Posted on Apr 24, 2009
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Remove, reseat and reconnect every connector at least 3
times. Remove the motor control board, spray it down with electronic cleaner
along with all connections by disconnecting them, spraying them down.
Disconnect and connect a few times to ensure good contact.. It appears that
spraying the board and connectors work.
Pl give me a ‘very helpful’ rating for the free help, thanks.
Posted on Jun 17, 2010
SOURCE: Washer will not start.
F28 is a serial bus error from the CCU (Central Control Unit) to the MCU (Motor Control Unit).
All you need is some Electronics contact cleaner spray and a 1/4 inch socket to remove the top of the machine and the back of the machine.
The CCU is the computer looking box at the top front right hand corner.
Find connector M13, (has red marking on it and only 3 wires) disconnect it by pushing the retainer tab back and pulling gently on the connector.
Spray the contacts of the connector and computer with connector cleaner.
Then re-assemble connector.
The MCU is in the back lower left corner.
Find the connector with 3 wires and red mark, and remove this connector in the same way you did the other, spray it and re-install.
Put the back and top back on.
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Posted on Sep 11, 2010
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