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The door latch contains an interlock switch that must signal the control board before any cycle can begin. A failed latch prevents this signal, causing the dishwasher to do nothing or beep and abort when Start is pressed.
A broken or worn latch mechanism fails to catch the door strike, leaving the door loose during operation and potentially allowing water leaks.
If the latch switch loses continuity during a wash cycle, the control board interprets the door as open and halts the cycle immediately as a safety measure.
A faulty switch inside the latch assembly incorrectly reports the door as open even when physically shut, triggering continuous beeping or error codes on the control panel.
💡 Pro Tip: How to Confirm Your Door Latch Has Failed
Your part is likely the culprit if you notice any of the following:
⚠️ Dishwasher won't start — pressing Start does nothing or panel beeps 3 times and does not begin a cycle
⚠️ Door feels loose or does not click firmly shut when closed
⚠️ Control panel lights up normally but cycle never initiates even with door fully pushed closed
⚠️ Diagnostic mode shows door-open error (lights continue to flash instead of going solid when door is shut)
🔍 Quick bench test: Disconnect power, close the door, then use a multimeter to check continuity across all three latch terminals. With the door closed, all three terminals should show continuity to each other. No continuity = failed latch. Also inspect latch strike WD13X10071 for excessive wear before ordering — a worn strike can cause repeated latch failures.
📦 What's in the Box
✅ 1× Door Latch & Switch Assembly (WD21X10490, tub-side, standard, with integrated 3-terminal interlock switch and mounting clip)
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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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