Robert D Seattle , WA October 25, 2015 Thermidar wall oven will just beep after about 15 minutes of turning it on no error have to turn breaker off in order to turn it off Replaced the main controller board, and this have resolved it, oven works great again. Read More... Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes Tools: Screwdrivers