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So error E90 means there is a communication error with your main control board. You can remove the screws coming in from the back of the top panel and the top panel will pull straight back, up, and off. Then look at the main control board behind the control panel where you push the buttons to select the cycle and ensure the plugs have not come loose. If everything checks good, the main control board would need to be replaced so below is a link to the part you'd need to order and replace.
CLICK HERE for main control board
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