First, identify which parts of the appliance need to be repaired. Troubleshooting an appliance involves many steps. Follow the manufacturer's instructions and check for tripped circuit breaker. Then, test the simplest options. If none of these steps fail, contact an appliance technician. We take appliances for granted and don't know why they need to be repaired. We don't want to damage expensive electronics.
Before working on the appliance, first disconnect electricity and gas. It is important not to damage it. You should also avoid touching the appliance. Before you make any adjustments, be sure the appliance is turned off. Also, make sure the part that you are replacing fits into the space. Be sure to read and follow the instructions for installation on your appliance's label. Before you attempt to install the new part, be sure to check the plug.