Read through the link thoroughly and follow the steps to diagnose what may the source of your problem. I would recommend making sure you don't have a siphoning issue, or a drain pump problem, first. These are usually the more common causes of this problem.
The manufacturer also recommends unplugging the washer for at least 30 minutes to reset the computer. This will often clear some of the more common problems. If you cannot get the error to reset, and are still having problems, please let me know.
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E90. The E90 error code is not a common error but it may occur when the washing machine electronics get wet for some reason. This may happen if wet clothes are left in the washer for a prolonged period after the wash cycle ends or if the same load is washed repeatedly.
One of the first steps whenever an error code appears on a Frigidaire washer is to perform a simple reset to the machine. To reset the washer, press and hold the "Cancel" button for 15 seconds. Then try to set a new wash cycle and press "Start." Note that any clothes that have finished washing should always be removed promptly after the cycle is done.
Hello Anne, thank you for allowing me to assist you!
Based on the symptoms you are describing it sounds like the
issue could be related to the door switch or control board. However, first let's
try recalling the error code by waking the unit and wait approximately five
seconds. Then press and hold CANCEL and START/PAUSE key at the same time. Error
code should display. With the error code I can help you determine the possible
If the washer does not display an error code, reset the
washer. This can be done by either unplugging it or flipping the household
circuit breaker off. It is important to wait approximately ten minutes, turn
the unit on and redo the steps above.
I ask that you please follow up with a comment on the post,
at your convenience, to advise if further troubleshooting is needed or if the
unit's status has changed successfully. Thank you!
The E90 error code is not a common error but it may occur when the washing machine electronics get wet for some reason. This may happen if wet clothes are left in the washer for a prolonged period after the wash cycle ends or if the same load is washed repeatedly. One of the first steps whenever an error code appears on a Frigidaire washer is to perform a simple reset to the machine. To reset the washer, press and hold the "Cancel" button for 15 seconds. Then try to set a new wash cycle and press "Start." Note that any clothes that have finished washing should always be removed promptly after the cycle is done.
If the cancel button reset does not remove the E90 error code from the display, try a full power reset. To accomplish this type of reset, unplug the washing machine and wait 15 minutes or more. Then plug the washing machine back in and make a new wash selection. If the error code does not return, normal function may resume.
Unfortunately, if the cancel button and/or full power reset attempts do not eliminate the E90 error code, it is very possible that the electronic control board will need to be replaced. Here is the board to order.
F21 is a Long Drain error.If the drain time exceeds 8 minutes this error code will be displayed.
First, attempt to unplug the washer for at LEAST 30 minutes to reset the Central Control Unit (CCU).Sometimes this is all that is required to correct momentary glitches with the unit.If the error code returns, proceed to step 2.
Check the drain hose to make sure it is not kinked or clogged.
Check the pump strainer. There
are three screws at the very bottom of washer. You will need and
extension and a star tip.
I used a 9/32 socket to remove them. The front cover slides right off.
Facing you is the pump strainer. Big
white piece of plastic right in the middle. Turn the large white
knob counter-clockwise to remove it and clean. It is the only thing you can unscrew by hand.
Open it and clean anything you find out.
1. Set the cycle knob to any "X" (reset) position 2. Press and hold the Pre-wash and the Start buttons at the same time. While still holding these buttons, turn the unit on by pressing the On/Off button 3. Keep holding the Pre-wash and the Start buttons until the digital display comes on (about 5 seconds) The digital display will show 00 for no faults or will show a fault code. To end the test program turn the washer off at any time
Water Supply Error occurs when water level frequency does not show changes more than 100Hz or water is not supplied up to the preset water level after 10 Minutes or more at the time of initial water supply. The error status can be cleared by turning the POWER switch OFF and back ON.
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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.