F35 error code constantly causes washing machine to shut down and the SUDS error code does the same. Whirlpool rep states to unplug unit and let sit for 30 minutes to reset, yet still has the same problem afterwards.

Maybe this will help, but I'm not sure

Condition:
SUDS LOCK (Overdose of Detergent detected during the Wash Cycle)
The motor control unit senses a suds lock condition by analyzing the current draw on the drive motor. If "Sud" is displayed a potential suds lock is detected. This may signify a bad pump, an extra heavy load, excessive detergent, or excessive suds.

Check:
If too much detergent was used, run the unit through a Rinse/Spin cycle, then a Normal cycle, without adding any detergent. This should clear the unit of the excess detergent.

Check the drain hose and make sure it is not plugged or kinked.
Check Wire Harness connectors to the Drain Pump, Pressure Switch, and Central Control Unit (CCU)
Check/Clean Drain Pump Filter of foreign objects
Check Drain Pump
Check Pressure Switch
Check CCU

Dado

The F35 indicates a water level pressure sensor failure. A loose wire harness connection could be causing this problem if there is no water or suds in the tub. I recommend unplugging the washer and removing the top panel. Screws at the very back of the top panel secure it to the washer frame. Remove the screws and then pull the top panel slightly back and then up and off of the washer. The analog water level pressure sensor is shown in the first image below. The second image shows a clear picture of this component. Check the wire harness connection on this sensor. If you find a loose connection, secure the wire harness properly on the component then reassemble and test the washer. If you continue to get the F35 code, then the pressure switch will need to be replaced. I hope this helps.

also for the F-28 issue
http://fixitnow.com/wp/2011/06/30/how-to-troubleshoot-an-f28-error-code-in-a-whirlpool-duet-sport-washer/

F35 error code is indicating a problem with the water level pressure switch operation (key#20). There could be a blockage in the air dome or pressure switch hose (key#21). The air dome is located on the back of the tub on the left hand side

SUD means the washer has detected suds, or foam inside the basket. Suds will cause the washer to wash poorly, and it can lead to other issues. The first step is to confirm you are using H-E detergent. H-E detergent is formulated to get your clothes clean with less water, and without creating foam

F25 is a DRIVE MOTOR TACHOMETER ERROR. This error is one of the toughest one since it really does not narrow it down. I would do plenty of testing before replacing the expensive parts. If the control is unable to properly detect motor speed, the machine shuts down.
If a failure occurs during high-speed spin, the door unlocks after 3 Minutes.
Possible Causes/Procedure
1. Verify the shipping system including shipping bolts, spacers and the power cord are removed.
2. Unplug washer or disconnect power.
3. Check drive motor tachometer resistance. It should be approx. 115 ohms.
4. Check wire harness connections between the drive motor and the Motor Control Unit (MCU), and between the MCU and the Central Control Unit (CCU).
5. Plug in washer or reconnect power.
6. Check the MCU by looking for operations of the drive motor.
7. Check the drive motor for powered rotations.

If everything checks out okay, you should think about replacing the MCU since it may not read your motor correctly.

SUDS error = SUDS LOCK (OVERDOSE OF DETERGENT
DETECTED DURING THE WASH CYCLE)
If suds are detected continuously by the pressure switch during the drain or spin phases, the washer will fill 4 liters of water and during 5 minutes the unit will rest without tumbling, the water will be drained
and it will try to spin or drain again.
If too much detergent was used:
- Run the unit through a RINSE/SPIN cycle.
- Run a NORMAL cycle without adding any detergent.
This should clear the unit of the excess detergent.
1. Check the drain hose and make sure it is not plugged or kinked.
2. Unplug washer or disconnect power.
3. Check wire harness connections to the drain pump, pressure switch, and Central Control Unit (CCU).
4. Check/clean drain pump filter of foreign objects.
5. Plug in washer or reconnect power.
6. Check drain pump.
7. Check the pressure switch.
8. Verify CCU operation by running a Diagnostic Test or any cycle.
F35 error = ANALOG PRESSURE SENSOR FAILURE
If this failure is displayed, there is any malfunction of the steamer component detected by the Steamer Electronic Board.
1. Check if pressure hose is fi xed correctly.
2. Check if the airtrap is not blocked.
3. Check if the hose is not blocked.

F35 is a water level error.
The water level switch (pressure switch) has malfunctioned.

If you remove the top panel, three screws in the back, you will have access to the pressure switch.

With the tub empty, remove the vinyl hose from the switch and blow backwards through the hose to clear any restrictions.

If the fault codes return after doing this, you will likely need to replace the pressure switch.


Also - please be sure to use He soap.

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Hi dear.I may have solution for the SUD error.You can give it a go.But I do not know any thing about F35 one
The motor control unit senses a suds lock condition by analyzing the current draw on the drive motor. If “Sud” is displayed a potential suds lock is detected. This may signify a bad pump, an extra heavy load, excessive detergent, or excessive suds.

Potential Causes

• If too much detergent was used, run the unit through a Rinse/ Spin cycle then a Normal cycle without adding any detergent. This should clear the unit of the excess detergent.
• Check the drain hose and make sure it is not plugged or kinked
• Check Wire Harness connections to the Drain Pump, Pressure Switch, and Central Control Unit (CCU)
• Check / Clean Drain Pump Filter of foreign objects
• Check Drain Pump
• Check the Pressure Switch
• Check CCU

Replace failed component.

As it says run couple of rine cycles it should get back to normal.I hope that helps you.Thanks.

Remove the service panel and see if the filter has something in it

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

If this is a steam unit you have a bad analog pressure switch,has been a common issue in those units,Gives an F35 core and sometimes a SUD code. 

F35 is a water level error.
The water level switch (pressure switch) has malfunctioned.

If you remove the top panel, three screws in the back, you will have access to the pressure switch.

With the tub empty, remove the vinyl hose from the switch and blow backwards through the hose to clear any restrictions.

If the fault codes return after doing this, you will likely need to replace the pressure switch.


Also - please be sure to use He soap.

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.####

suds is determined using the level sw located on top right rear side. remove top cover to see. most letter codes do convert to a f code. most common reason for suds error is use of standard detergent or too much detergent. running a empty load of fabric softener can clean the system. or rinse/spin with nothing. other common problem is this is a whirlpool product.