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Thread: DV48H7400EW Samsung Dryer Will not Power On

  1. #1
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    Default DV48H7400EW Samsung Dryer Will not Power On

    Model Number: DV48H7400EW
    Brand: Samsung
    Age: 1-5 years

    I have a Samsung DV48H7400EW That will not turn on when the power button is pressed. I have checked the following:

    • There is power coming from the outlet 240 (120 on each pole)
    • The door switch is working and shows minimum resistance (continuity)
    • There are no wires that look burned or broken
    • The control board does not have any visible black marks
    • The thermal fuse, terminal block and thermostat all have minimal resistance (continuity)


    I don't know what else to check or how, but if someone could provide some ideas I would greatly appreciate it. The dryer worked the day before and then next day no power. At first I thought it was the breaker but that wasn't tripped which is why I tested the outlet and there is power like its supposed to have. I'm at a total loss.

    Thanks
    Last edited by Jake; January 14th, 2018 at 03:04 PM. Reason: Corrected model number

  2. #2
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    Correction... Its model DV48H7400EW

  3. #3
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    Default

    Hi,

    Here's the parts diagram for your model: Samsung Dryer DV48H7400EW/A2-0000 / Repair Parts

    So when you turn it on you're not getting any lights or anything? Like its dead? If so, and your power to the dryer is good, then it sounds like the control board went out.

    Have you been having any electrical or power problems in your house or neighborhood recently?

    Here's the control board for your model:
    DC92-01626A Assy Pcb Main


    Jake
    Appliance Repair School 1987-1988
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  4. #4
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    Also did you ohm test the thermal fuse on the blower wheel?

    This model has two thermal fuses, one on the blower wheel, one on the heating element housing.

    Jake
    Appliance Repair School 1987-1988
    Star Appliance Tech. 2 yrs. 1988-1990
    Wards Appliance Tech. 11 yrs. 1990-2001
    Sears Appliance Tech. 4 yrs. 2001-Oct. 2005
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  5. #5
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    I don't know if the neighborhood had power issues. This is the only device in my house that had a problem. I was thinking it was the control board since I couldn't find anything else, but yes it is completely dead as though the breaker was tripped.

    I did not check the blower fuse before but I just did and that thermal fuse is not open either, still has continuity. However, the dryer thermister (to the left of it labeled 2-5 on the diagram) is open, but I don't know if that is supposed to be like that or not.

    If the thermister is how it should be then I will order a new control board. Also just to be sure I even checked the Power button to make sure the plastic that physically pushed the switch on the board wasn't broken.

    Thank you for your help!
    Last edited by chadjcraig; January 15th, 2018 at 12:43 AM.

  6. #6
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    The thermistor won't ohm open or closed, its a temperature based resistance.

    The thermistor should be approx 10,000 ohms at room temp.

    Yes, I'd order and replace the control board.

    Jake
    Appliance Repair School 1987-1988
    Star Appliance Tech. 2 yrs. 1988-1990
    Wards Appliance Tech. 11 yrs. 1990-2001
    Sears Appliance Tech. 4 yrs. 2001-Oct. 2005
    Jake's Appliance Repair Nov. 2005-present

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  7. #7
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    Ok that makes sense, thank you very much!

  8. #8
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    Glad to help, let us know how it goes.

    Jake
    Appliance Repair School 1987-1988
    Star Appliance Tech. 2 yrs. 1988-1990
    Wards Appliance Tech. 11 yrs. 1990-2001
    Sears Appliance Tech. 4 yrs. 2001-Oct. 2005
    Jake's Appliance Repair Nov. 2005-present

    Look-Up & Order Parts

  9. #9
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    Just got the board in and it powered right up. That was it. Thank you very much!!

  10. #10
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    Excellent Chad, glad to hear that.

    Thanks for the update!

    Jake
    Appliance Repair School 1987-1988
    Star Appliance Tech. 2 yrs. 1988-1990
    Wards Appliance Tech. 11 yrs. 1990-2001
    Sears Appliance Tech. 4 yrs. 2001-Oct. 2005
    Jake's Appliance Repair Nov. 2005-present

    Look-Up & Order Parts

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