Question about Washing Machines
Error code F70 means Control Unit Failure, no communication is detected between the control board & interface. You'll need to use a multimeter to check for the continuity between the Keypad and the control board. Inspect the wiring between the boards. Also check for any burnt component on the control board. You may need to replace the control board or user interface. To be sure whether the boards use a multimeter. Usually if the drum moves then user interface is bad else its the control board. hope this helps...
Posted on Aug 28, 2010
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Posted on Jan 02, 2017
If you unplug the M13 connection from the ccu (main control) and the error goes away then replace the MCU (motor control unit) if it does not go away then replace the CCU
Posted on Nov 20, 2010
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Sep 16, 2014 | Washing Machines
Sep 08, 2014 | Maytag Dryers
Hello & Welcome to FixYa
F21 error is displayed when the washer is unable to drain, press PAUSE/CANCEL button twice to clear the display. After this please check the drain hose and drain pump filter for any blockages and make sure it is not clogged with foreign particles. You can also check the drain pump to verify that its working. Please get back to me if you have any other questions.
Aug 05, 2011 | Maytag Washing Machines
Jun 30, 2011 | Maytag Washing Machines
I provided a complete list of error codes for this type of washer in the image below. The error codes vary by the exact model of HE3t washer that you have. Since you have an HE3t that is displaying the F70 and F71 codes, the list below should apply to your model. These are not listed in the owner's manual because they are intended for technicians. Use extreme caution if you follow any of the troubleshooting described in this information sheet. Unplug the washer and shut off the water supply before accessing internal components.
The F70 and F71 codes indicate that you have a communication error between the CCU (Central Control Unit or main machine control board) and the user interface touch pad assembly. Here are some troubleshooting tips:
Make sure that you have the washer plugged into a properly grounded 3 prong 120 volt AC electrical outlet.
Unplug the washer for 30 seconds to allow the control boards to power down and reset. Plug the washer back in but do not touch the power button (or any other buttons) for 1 full minute. This may reset the control board. Pressing the power button too quickly after reapplying electrical power to the washer can cause the F70 or F71 code since the CCU does not have time to recognize the user interface control.
If the above tip does not help then the most suspect component failure is the MCU (motor control unit -- motor control board at the bottom of the washer beside the drive motor). You can check for this failure by unplugging the washer and then pulling the MI3 connection on the CCU. The wiring diagram below has the MI3 connection highlighted in red. The connection has blue wires. The third image below shows this connection on the control board. The connections are labeled on the control board. Press the tab at the bottom of this plug down and then pull it out. Power up the machine with this connection unplugged and don't touch any buttons for 1 minute. If you then press the power button to turn on the washer and don't get the F70 or F71 code then the MCU at the bottom of the washer will likely need to be replaced to fix this problem. A technician would normally be needed to verify this failure and replace the MCU. The MCU is expensive ($423).
This troubleshooting information is based on a common HE3t model that displays the F70 and F71 codes. If you need more help, submit additional details and the full model number of your HE3t washer.
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