If you're encountering a "Door Open" code on your Amana NED7200TW electric dryer even when the door is properly closed, it's likely a problem with the door switch or the sensor that detects whether the door is open or closed. Here's a step-by-step guide to help you troubleshoot and potentially fix the issue: 1. Safety First: Ensure the dryer is unplugged from the power source before attempting any repairs to ensure your safety. 2. Inspect the Door Switch: The door switch is a small mechanism located around the dryer door frame that signals whether the door is open or closed. Check for any visible damage, loose wires, or corrosion. If the switch is damaged or not functioning, it might need replacement. 3. Clean the Sensor Area: If there's dirt, lint, or debris around the door area or the sensor, clean it thoroughly. Sometimes, these obstructions can interfere with the sensor's proper operation. 4. Check for Sensor Blockage: Inside the dryer, near the door, there's usually a small sensor or switch that detects whether the door is open or closed. Make sure nothing is obstructing this sensor's movement. 5. Test the Door Switch: Use a multimeter to test the continuity of the door switch. With the dryer unplugged, remove the switch and test its continuity (usually indicated by a "beep" sound on the multimeter) when the switch is pressed. If there's no continuity when it's pressed, the switch may be faulty and should be replaced. 6. Check Wiring Connections: Inspect the wires connected to the door switch and the sensor. Loose or damaged wires can cause issues. Reconnect or repair any loose wires. 7. Reset the Dryer: After performing the necessary checks and repairs, plug the dryer back in and try resetting it. If the "Door Open" code persists, it might require more in-depth troubleshooting or professional help. 8. Contact Amana Support: If you're unable to diagnose and fix the issue on your own, it's recommended to contact Amana's customer support or consult a professional appliance repair technician. They can provide more accurate diagnosis and repair solutions. Remember, working with electrical appliances requires caution. If you're not comfortable with these troubleshooting steps, it's safer to seek help from a professional to ensure the proper functioning of your Amana NED7200TW electric dryer.