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SUDS and F35 error for HE5t

I’ve checked all of the forums and am comfortable with replacing parts but not diagnosing electronic components for failuers. My HE5t has the SUDS/F35 error. I’ve tried the following solutions:

1) inspect sensor tube - OK, can blow air through it OK and none at all when closing one end

2) flushed/dried the pressure sensor with circuit cleaner

3) tried steam cleaning cycles with bleach and with vinegar

4) replaced the pressure sensor

5) replaced the main circuit control board

Still getting the same error. In all my testing, I was starting to get F21 errors after replacing the pressure sensor when shutting off after getting SUDS or F35. After replacing the main circuit control board, no more F21 errors but still SUDS/F35.

Have also checked the trap under the drum and cleaned out the filter there. ANY IDEAS what to try next!?

thank you

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Below lists the main causes and it appears you have covered them all except maybe the detergent error that is giving the SUD error.

The F35 error code indicates an analog pressure sensor error. The analog pressure sensor is the component that detects water level in the washer tub. This error can usually be cleared but it will occur again if the main control board still detects a problem with the signal from the analog pressure sensor. This error code can be caused by a problem with the air pressure tube between the bottom of the washer tub and the analog pressure sensor. If you are able to unplug the washer and check this air pressure tube, you may be able to resolve this problem. The analog pressure sensor can be accessed by pulling off the top panel of your washer. Remove the screws at the very back of the top panel and then pull it back slightly and then up and off of the washer. With the washer unplugged, check the connection of the air pressure tube to this component. Check the entire air tube down to its connection to the bottom of the washer tub. You will likely need to remove the back panel of the washer to check the entire air pressure tube. If you find a kink, tear, hose or loose connection in the air pressure tube, then this is the likely cause of your F35 error code. If the air pressure tube appears to be okay, then you will likely need to replace the analog pressure sensor. If the problem still exists after replacing this component, then the main electronic control board for the washer will need to be replaced. If you are not completely confident in your technical ability to safely access and check these components, I recommend calling a service technician to diagnose and repair the washer.

SUD

This error code indicates excessive detergent suds occurred during the cycle. This could be caused by using too much detergent or not using High Efficiency (HE) detergent.

The washer will not be able to spin out water with the excess suds. When "Sud" or "Sd" is displayed, the washer automatically extends the rinse time to remove the excess suds. During this time, the washer pauses the tumbling and adds water for additional rinsing. This pause allows the bubbles in the suds to break. This pause and rinsing are necessary and may occur several times to eliminate the suds. This could significantly lengthen the time for your washer to complete the cycle.



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thanks for the advice but I have stated already that I've tried all of the above. Looking to see what next?

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