Steve for Model Number wed4800xq3 Timer on Whirlpool model WED4800XQ3 has a white jumper wire connecting the W and BY terminals. It looks like a factory constructed jumper but is not shown anywhere on the wiring diagram. Wiring diagram shows an optional "guard switch" but does not show any wires connected to any of its terminals. This model has no guard switch on the control panel, only buzzer on-off/push to start, temperature control, and timer switch. I'm wondering if it caused a brand new non OEM operating thermostat from China to malfunction and melt down like a welding rod with sparks and flames shooting out of it.
Answer Steve, if your model does not have the wrinkle guard setting on the timer, I would go ahead and move the jumper wire to our new timer. Based on the wiring diagram, it closes the open switch from BY to W, without the jumper, there would be an open circuit. Read More... Answered by AppliancePartsPros.com | Tuesday, January 8, 2019