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testing push to start switch

testing push to start switch

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Thread: testing push to start switch

  1. #1
    Join Date
    May 2013
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    Default testing push to start switch

    How do you go about ohming a push-to-start switch? I saw one guy getting continuity while pressing the button. How does that tell you the switch will work as it is supposed to?

    Since it is a momentary switch, is that all that is needed? What keeps the circuit closed for the motor to run?
    Last edited by Boman; 12-11-2014 at 07:57 PM.

  2. #2
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    How do you go about ohming a push-to-start switch?


    Since it is a momentary switch, is that all that is needed?
    For most of them, yes.

    What keeps the circuit closed for the motor to run?
    Once the motor is up and running the centrifugal switch in the motor does that.

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

  3. #3
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    Thought so. I had put the part about the centrifugal switch in as a possible answer, but removed it.

    I think that is the same video I had watched.

    I will post a similiar question concerning indicator lights.

    Thanks

  4. #4

    Default

    Many Whirlpool dryers use a push to start relay type switch. The solenoid in the switch keeps the switch closed once pushed. Dryers with electronic control vs mechanical timers use relays to control the motor and only rely on the centrifugal switch to disconnect the start winding after the motor has started.

  5. #5
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    Many Whirlpool dryers use a push to start relay type switch
    A couple versions...

    testing push to start switch-start-switch-3398095-00565201-jpg Push to start switch

    testing push to start switch-start-switch-3398094-01708910-jpg Push to start relay switch

    testing push to start switch-start-switch-w10117655-01289655-jpg Push to start switch

    testing push to start switch-start-switch-3395395-00948269-jpg Push to start switch

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

  6. #6
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    Default

    The one inthe video relies on the centrifugal switch? If it shows continuity with the button pressed, it should be good?

    How do you check the others?

  7. #7
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    The one inthe video relies on the centrifugal switch? If it shows continuity with the button pressed, it should be good?
    Yupper.

    How do you check the others?
    The main switch will open and close the same way as above, the relay needs power to keep it closed.

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

  8. #8
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    3398095

    Very simialr to the second relay. I get continuity between two terminals without pushing the knob down. I then get it between each of these and one of the others as long as I hold the button down. I sort of understand that, but I have one terminal left that shows no continuity at any time with any of the others. Does this mean this is a bad relay?
    ?

  9. #9
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    So contacts R1 to R2 should be 0 ohms when it is pushed in.
    Coil is likely a high ohm, like 2000 ohms or higher.
    Can't read very well the other letters/numbers....looks like C11 to NO should also have continuity.

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

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