Lance L Anchorage , AK January 15, 2017 Appliance: Whirlpool Trash Compactor GC900QPKB0 Whirlpool Compactor Gc900qpkb0: The compacter would go down and back up once it came to the top it would keep running. How to replace Off Switch. Easy fix changed the assembly switch and its working good again 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes