Answer Hello Dale. If the damper assembly is not opening or closing properly, then the issue could be the damper assembly WR49X10091 in the unit. You will need to check and see if the thermistors WR55X10025 are bad on the unit. They should read around 10k at room temperature. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html Read More... Answered by AppliancePartsPros.com | Friday, June 8, 2012