Clear guides to dryer door switches, how they work, and how to troubleshoot common problems when a dryer will not start or behaves unexpectedly.
Dryer door switches are small safety components located inside the dryer door frame. When the dryer door closes, the switch activates and allows the dryer to run. If the switch fails, the dryer may not start, may stop unexpectedly, or may behave as if the door is still open.
This site provides simple informational guides to help you understand how dryer door switches work, what symptoms they cause when they fail, and how to diagnose common problems.

Dryer Door Switch Guides
If you are trying to diagnose a problem with your dryer, start with the main overview guide.
Dryer Door Switch: What It Does and How It Works
This guide explains what the switch does, where it is located, and how it affects dryer operation.
Troubleshooting Dryer Door Switch Problems
If your dryer is not working correctly, the following guides explain the most common problems related to the door switch.
Dryer Won’t Start Door Switch Problem
Dryer Door Latch Not Engaging Switch
Dryer Starts Then Stops Door Switch
Dryer Door Switch Clicking But Not Starting
Testing and Replacement Guides
If you need to test or replace a dryer door switch, these guides walk through the process.
How To Test a Dryer Door Switch
How To Replace a Dryer Door Switch
Brand Compatibility Guides
Some dryers use slightly different door switch designs depending on the manufacturer. These guides explain compatibility and replacement considerations.
GE Dryer Door Switch Replacement