Allen G Santa Ana , CA October 29, 2014 Appliance: Model KCMS2055SSS-2 Did not turn on Replaced a bad thermostat. The factory thermostat had a bad internal connection (one contact was loose) and that caused the insulation to melt with the eventual failure of the thermostat. I ordered the exact replacement part from "AppliancePartsPros.com" and quickly saved the cost of a new built in Microwave oven. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes