Comunication error between motor control unit and Central control unit. Broken wire in the harness.
F01 power glitch: disconnect power for 2 mins verify correct CCU operation
F11 Motor control unit internal failure MCU board failure or broken wire.
F20 No water detected entering machine, pressure switch hose clogged
F21 Long drain Possible cause: Clogged filter, clogged/failed pump
F22 Door lock error Failed lock. corrosion,or broken wires.
F23 Heater Failure Bad heater
F24 Water temp sensor error Failed sensor or heater
F25 Motor Tach error Bad MCU (motor control unit) or broken wire
F26 Door switch error Door not opened after 3 cycles. Note: suds errors cause the machine to try 3 times to fix a problem with wrong detergent too much detergent , and this error could be associated with that, my opinion
F27 Overflow condition Clogged drain, pump, kinked hose.
F28 Com error between MCU and CCU (central control unit) Broken wire
F29 Door unlock error bad switch,broken wire,corrosion
F30 Dispenser system error Bad or jammed motor, broken wire
F31 MCU failure due to motor overheating.
F33 Pump drive system error, broken wire, corrosion
rL (prewash)Clothes detect. Remove clothes and retry.
5d Suds lock detergent overdose(hay I ain't making this up, too much detergent, the wrong stuff, added to the wrong compartment, etc
The technicial data sheet along with that pesky clogged pump is located behind the toe kick panel; remove the screws under the bottom front edge of the washer. Tip the appliance back to get to them screws. With the screws removed, the panel will comes down and off.
For diagnostics and further info refer to this handy dandy:
DUET SERVICE MANUAL My tip:
http://www.fixya.com/support/r4232744-duet_sport_washer_error_codes
If you need further help, reach me via phone at
https://www.6ya.com/expert/dan_73bbd84fe1d95b61
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