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Hi, I have an hotpoint wd640 washer/dryer that has stopped working had some assistance b4 but didn't solve the problem. There is power getting to machine,it was suggested the maine control board was gone,top right behind main switches/readout, but replaced this but know difference and power is getting to this as I had a shock off it any other suggestions thanx

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  • bruce Apr 03, 2011

    Machine just stopped working,no digital read out no power at the on off power sw but power appears to be getting to machine

  • bruce Apr 03, 2011


  • bruce Apr 06, 2011

    Hi kelly washer/dryer seems to have nothing no lights as if the power is off have replaced and tested plug fuse ok seems to be power in main cable and I recieved a shock off mcb any ideas thanx

  • bruce Apr 06, 2011

    Hi Rich you find out any info

  • bruce Apr 06, 2011

    Hi kelly washer/dryer appears to have no power no lights nothing but have checked plug fuse and there seems to be power in cable and machine


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What are your symptoms Please that got you a main board replace response?
There are several things than can cause a no-responsive control panel or inproperly funtioning washing machine:
1. Door switch / Listen for a click as the door just closes or opens. No click = bad switch
2. Child lock (Press and hold chil lock for more than 3 seconds)
3. Suds Sensor coated with debris (Behind filter remove filter / reach in and clean)
4. Filter (Remove and clean_

F05 (filter error / clogged filter)
F11 (Pump can not be activated / Bad pump or PBC-Main board error)

The information in your post this time does not really give me enough information to properly respond.


Posted on Apr 04, 2011

  • Kelly
    Kelly Apr 06, 2011

    The main board has a transformer on it that provides low voltage AC outputs into diodes to make DC for the Display and Control functions. A knowledgeable person has to be able to locate the transformer outputs and verify the low voltage AC outputs of the transformer and the DC voltage after the diodes. The transformers fail and then everything about the machine control is dead. Here is the kicker.... These units also have a motor control board and if the currently installed motor control board is bad and you install a new MAIN PCB and<- it can fail in minutes! Since you have no lights no display the only thing that comes to mind would be to check thermistors. You said you got a shock from the Main PCB so I doubt the thermistor is bad..

    DOES the DOOR SWITCH click at all? No Click.. and this can cause your symptom. (micro-switch type click as door is just opened or closed)

    I know this is not the answer you wanted to hear but it is the best I can do from here to explain what is happening with your machine.



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What exactly is the problem that you are having?

Posted on Apr 03, 2011

  • Richard Roth
    Richard Roth Apr 03, 2011

    Ok, let me see what info I have on that. I will post back shortly.


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