Bottom of oven was stained could not remove by normal means Charles M. • South Charleston, WV • November 28, 2014 Appliance: Model 867OWS My Repair & Advice Purchased new oven bottom. Replacement was easy. Simply removed two screws at back of bottom oven, replaced what appears to be a heat plate and reinstalled. Took less than 10 minutes. Was this review helpful to you?