Eric H Lake George , CO December 21, 2019 Samsung slide in range c 31 code after self cleaning. Called Appliance Parts Pros and gave them my model number and the code it was displaying. Agent spent a few minutes researching and had me disconnect door lock servo as door was locked too. Determined Main control board was bad possibly due to bad thermostat. Ordered both parts for total of $133. Replacement took under 30 minutes from start to finish with a phillips screwdriver. Repairman wanted about that much just to come and diagnose the problem. Great Job Appliance Parts Pro.s Second time I have used Appliance Parts Pro s and both times it has been excellent service and advice. Customer for life. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes