Hi guys/gals. I have a 5 year old Whirlpool oven model WFE320M0EB0 showing an F9 code which from what I gather has something to do with a faulty door lock switch. I've been through the power cycling routine more times that I can count, No recent power outages that would cause line noise, and been in service for 5 years. No other electrical work has been done or changed in the home.

Also, this oven doesn't have a door lock so Im completely confused about the error code. Any ideas? When this first started my daughter went to preheat the oven and she set the temp for 425. The oven beeped at normal time it would have taken to get up to that temp but the display would only show 100 degrees and the oven was cold. When pressing any other button after that only F9 would appear. I followed Whirlpool's advice and powered down at the breaker for a minute and flipped it back on. Now the darn thing will only display the F9 code and beep every second until I press cancel. No other buttons will work nor will display change from showing f9.