Cory D Charlevoix , MI July 27, 2014 Appliance: Whirlpool Trash Compactor TC900QPDB1 Whirlpool Compactor Tc900qpdb1: Trash compactor wouldn't shut off after cycling. How to replace Assembly, Switch (Black). Main control replacement quick is the on off switch on front of machine. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes