When your Samsung microwave won't start or runs with the door ajar, a faulty interlock switch is often the culprit. The 3405-001034 is the genuine replacement component that monitors door closure and prevents operation until it's fully secured. Over time, wear and tear can compromise this critical safety mechanism, leading to performance issues. Installing this OEM part restores proper door detection and gets your microwave back to reliable, everyday use—without the hassle or expense of a full unit replacement.
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