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FIXED WF405ATPASU/AA Samsung front-load washer 3E error

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erikhg

Premium Member
Joined
Dec 28, 2019
Messages
4
Location
Ottawa, Canada
Model Number
WF405ATPASU
Brand
Samsung
Age
6-10 years
We bought our Samsung washer in 2013: model WF405ATPASU/AA. It worked perfectly until recently. Last week the washer stopped functioning showing an error message “3E”. So, I downloaded some documentation and did several diagnostic tests. Here is the list:
  • Visual test: the drum moves freely with a hand push.
  • No sign of water flood anywhere in the washer.
  • The washer turns on.
  • The washer never initiates a wash cycle when I starts one.
  • Quick Test Mode:
  • All DEL dials light up: ok
  • water valve test: ok
  • door lock/unlock test: ok
  • water heater test: ok
  • drain/bubble pump test: ok
  • error code message: 3E2
  • EEPROM can be erased if necessary: ok
  • Quick spin test: NO
  • Cycle count check: 0001… obviously as the motor does not turn.
  • S/W version check: Y7 53
  • Board input test:
  • Water temp. °C: 17
  • Water temp. °F: 62
  • Door status (CL or OP): ok
  • Door lock switch status (LO or UL): ok
  • Water frequency: 2546
  • Night wash course: “--" , ok
  • Hall sensor check, CN3#4-3 and CN3#4-2: 0 or 1.3V while moving manually the rotor: ok
    Hall sensor was disassembled and tested by two different tests and was still ok.
  • Motor check (resistance): CN5#1-2, CN5#1-3, CN5#2-3: 12 ohms each: ok
  • Door lock check: CN6#1-2: 0V unlock door, 120V locked door: ok
  • Other tests not necessary as it is a 3E error.
So, what is wrong with my washer? and what should I do?
 
Last edited:

erikhg

Premium Member
Joined
Dec 28, 2019
Messages
4
Location
Ottawa, Canada
ok, this seems overwhelming as I see several views, but no response.
Error code: 3E which means a motor circuitry problem. Yet, no connexions appeared faulty, hall sensor functions correctly, appropriate resistance in the motor, inputs to main board are fine.
I'm inclined to think it is the main circuit board, but I don't have enough experience (in fact, none!) to conclude clearly. Could it be just a software (firmware) issue? Is it possible to reload it?
Help me!!!
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
112,006
Location
McMullen Valley, Arizona
Hi,

I rarely work on Samsung appliances, and I've never had one do this error code 3E, so you'll just have to go by what the service manual says to do. I'm attaching your service manual below.

Page 19 says what error code 3E is, the list is quite extensive. On page 23 it shows you what to test, if you've done all that already and everything tests good, then yes it's possibly the control board(pcb).

Here's some threads below of what other members did to fix this error code 3E.



Also read this thread about what our Samsung tech wildimaginations says as well, because that one guy Fierodude replaced the control board(pcb) and it still didn't fix it:

Jake
 

Attachments

  • WF42H5200AP_WF42H5200AF_WF42H5200AWA2-A2_SM.pdf
    2 MB · Views: 99

erikhg

Premium Member
Joined
Dec 28, 2019
Messages
4
Location
Ottawa, Canada
Hi Jake,
I have confonding documents for the hall sensor. The document you sent me mentioned 3.75V between the ground wire and both hall output wires (A and B). Yet, it's not for the same Samsung washer. The document I have mentioned 1.3V between the ground and the hall sensor output wires.
So, I got 0V and 1.3V between the ground and the Hall sensor output. Is that enough?
If I verify the voltage between the 5V pole and the Hall sensor output, I get 4V and 6V while moving the motor. Sound strange, isn't it?
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
112,006
Location
McMullen Valley, Arizona
That is very odd, like I mentioned I rarely have service calls on Samsung washers, they are not popular in my area.

I've replaced a few drain pumps but that's about it.

I can't answer those questions, hopefully another tech that does these day in and day out can shed some light on this for you.

Jake
 

erikhg

Premium Member
Joined
Dec 28, 2019
Messages
4
Location
Ottawa, Canada
Hi, just for the record, I fixed the washer. Strangely, when I changed the hall sensor, the washer was still dysfunctional.
However, when I changed the main PC board in the back, everything started working back magically.
Happiness is in my hearth! I don't have to go at the landromat this week.
Happy new year!
Erik
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
112,006
Location
McMullen Valley, Arizona
Excellent Erik, glad to hear that. (y)

Thanks for the update! Happy New Year!

Jake
 
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