The 12038730 is the OEM Bosch microwave door switch kit, designed to restore safe and proper door interlock operation on compatible Bosch microwave models. If your microwave won't start, runs with the door open, or the door latch feels loose or unresponsive, a failed door switch is the most common cause — and this kit is the correct OEM fix.

✓ Model-Specific Repair Pages

The door switch kit includes the interlock switches that signal to the microwave's control board that the door is securely closed before allowing the unit to operate. A faulty switch is a safety-critical failure — microwaves are designed to shut down entirely when the interlock circuit is broken. Replacing the switch kit restores full functionality and ensures your appliance meets its original safety standards.

✓ Common Symptoms Fixed

Microwave won't turn on or start — Microwave runs with door open — Door latch feels loose or doesn't click — Microwave stops mid-cycle — Blown fuse after door slam

✓ Key Features & Specifications

OEM Bosch part number 12038730 — Includes door interlock switch components — Direct-fit replacement, no modification required — Restores proper door safety interlock circuit — Compatible with select Bosch built-in and countertop microwave models

✓ Buying Options

New OEM (Part # 12038730): Genuine Bosch factory part. Full OEM lifespan and fit guarantee. Recommended for all repairs where longevity and exact-fit are priorities.

Aftermarket (12038730XP): XPart Supply aftermarket cross-reference. Engineered to meet or exceed OEM specifications at a lower price point. XPart Supply aftermarket replacement parts are not affiliated with, sponsored by, or endorsed by Bosch or any OEM manufacturer.

Used OEM: Pulled from a working unit. Ideal for budget repairs or older appliances. Sold as-is; no warranty.

✓ Replacement Part Numbers

12038730 — 12038730XP (aftermarket cross-reference)

✓ Installation Tips

Unplug the microwave before beginning any repair — capacitors can hold a lethal charge even when unplugged; discharge before touching internal components. The door switch assembly is typically accessed by removing the outer cabinet or inner door panel depending on model. Disconnect the wire harness connectors, swap the switch(es), and reassemble. Test door interlock function before restoring power. If a fuse blew due to a door slam, replace the fuse at the same time as the switch kit.