Tired of guessing on service calls?

Click here to check out our structured, online appliance repair training courses for rookies and experienced techs.

FAQs | Repair Videos | Academy | Newsletter | Podcast | Contact

Stay connected with us...

Samurai on Facebook - become a fan today! Sign up for our free newsletter and keep up with all things Appliantology. Subscribe to our YouTube channel for lots of appliance repair tips and help! Follow the Samurai on Twitter and get timely morsels of Appliantological Wisdom! Subscribe to our MST Radio podcast to learn secrets of the trade.
  • Announcements

    • Samurai Appliance Repair Man

      Webinar Recordings Index Page   07/27/2017

      One of the benefits of your Professional Appliantologist membership is that you can attend the regular, live training webinars and you have access to the recordings as well. So if you can't make it to the live webinar, catch the recording at your convenience. The webinar recordings are conveniently listed for you on the Webinar Recordings Index Page.   

Samurai Appliance Repair Man's Blog

  • entries
  • comments
  • views

A Backdoor Test for the Mode Shifter in the Whirlpool VM Washers

Samurai Appliance Repair Man


These new Whirlpool vertical modular (VM) top-loading washers are pretty easy to troubleshoot, mostly because they practically troubleshoot themselves with fault/error code combinations that you can read in diagnostic mode.

The mode shifter has turned out to be one of the common-fail parts on this washer and it's regular rolling inventory for me. Although the fault/error codes will point specifically to the mode shifter if there's a problem with it, there may be situations where you want to test the mode shifter directly. Brother Eric calls the dance steps on that little ditty:

Yes, you should have 5vdc at J2 pin 2 (pink) with connector disconnected. This is a digital logic level provided via pull-up resistor on the control board. The rpm sensor in the shifter will "pull" this level low (0 volts) each time the optical sensor light path is interrupted by the rotating blade inside the transmission. This creates a digital square wave to the processor (switches between 5vdc and 0vdc). The frequency of the square wave is dependent upon speed of rotation of the transmission and is calclulated by the processor to determine rpm. If you monitor J2 pin 2 while wire harness is connected and rotate the tub very slowly, you should see it switch between 5vdc and 0vdc. You should also have 5vdc on J2 pin 1 when in spin mode and 0vdc when in agitate mode.


Source: Amana NTW4600yq