




Dryer does not start when door is closed — the faulty switch fails to signal the control board that the door is latched, preventing the cycle from initiating.
Dryer continues to run after the door is opened — switch contacts are stuck closed and no longer signal the dryer to stop when the door opens.
Dryer starts only when the door is slammed, or stops unexpectedly mid-cycle — indicates worn or intermittently failing switch contacts inside the assembly.
Interior drum light stays off when door is open or stays illuminated when door is closed — the door switch also controls the drum light circuit on many Whirlpool-platform dryers.
💡 Pro Tip: How to Diagnose a Failed Dryer Door Switch
Your part is likely the culprit if you notice any of the following:
⚠️ Dryer will not start even though the door appears fully closed
⚠️ Dryer keeps running after you open the door (won't shut off)
⚠️ Dryer starts intermittently or only starts when the door is slammed hard
⚠️ Drum light stays off when door is open, or stays on when door is closed
Quick test: Set your multimeter to continuity mode. With the door open, probe the switch terminals — a good switch will show continuity on the normally-closed (NC) circuit and no continuity on the normally-open (NO) circuit. Press the plunger manually: the readings should swap. If you get no change, the switch has failed and needs replacement.
📦 What's in the Box
✅ 1× Dryer Door Switch Assembly with 3-Wire Harness and Connector Plug (replaces WP3406105 / 3406104)
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Disclaimer: Compatibility information, part numbers, and model fitment data on this page are sourced from manufacturer databases and third-party references. While we strive for accuracy, please verify your appliance model number before ordering. Heima is not responsible for errors or omissions in compatibility listings.
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