Microwave Won't Start? LG Door Interlock Switch 6600W1K001C – Fix Door Safety Fast

If your LG microwave runs for a second then stops, won't start at all, or blows fuses repeatedly, a failed door interlock switch is the most common cause. In most LG over-the-range and countertop microwaves, the door interlock system uses multiple switches that must all close in sequence when the door shuts. When one fails, the microwave detects an open-door condition and refuses to operate — or worse, blows the main fuse. ⚡ Common failure point in LG-built microwaves. Part 6600W1K001C is the genuine OEM replacement interlock switch that restores proper door safety sequencing and gets your microwave running again.

❓ Is This the Right Part?

This is the correct fix if ALL of the following are true:

• ✔ Your microwave powers on (display works, light comes on)
• ✔ The door closes and latches physically
• ✔ The outlet and circuit breaker are confirmed OK
• ✔ The turntable and fan work normally in other modes
• ✔ ONLY problem is the microwave won't heat or start when door is closed

Not sure? Send us your model number — we'll confirm before you order.

🔧 Common Symptoms

• Microwave won't start when door is closed — most common complaint
• Microwave starts then immediately stops after 1–2 seconds
• Microwave blows the main fuse repeatedly
• Display works but no heating occurs
• Door feels like it latches but microwave doesn't recognize it as closed
• Error code or no response when pressing Start

✔ If these symptoms match, the door interlock switch is the most likely failed component in the system.

✔ In most cases, replacing this door switch restores normal microwave operation immediately.

📦 Part Details

• Part Number: 6600W1K001C
• Type: Microwave Door Interlock Switch (Primary / Secondary)
• Replaces: OEM direct-fit door switch assembly — supersedes 6600W1K001B, 6600W1K001A (no modification required)
• Brands: LG, Kenmore

⚙️ Installation

Skill Level: MODERATE — 20–35 minutes. Unplug the microwave completely before starting — capacitors inside can hold a lethal charge even when unplugged; do not touch the capacitor or magnetron. Remove the outer cabinet (typically 4–6 screws on the back panel), locate the door switch assembly behind the latch hooks, disconnect the wire harness, swap the switch, and reassemble. After replacement, test all door interlock switches with a multimeter before powering on.

✓ Compatible Models

Confirmed compatible with LMV1683ST, LMV1683SB, LMV1683SW, LMV1762ST, LMV1762SB, LMV1762SW, LMV2031ST, LMV2031SB, LMV2031SW, LMV2053ST, LMV2053SB, LMV2053SW, LMV2085ST, LMV2085SB, LMV2085SW, LMV1831ST, LMV1831SB, LMV1831SW, LMV1764ST, LMV1764SB, LMV1764SW, LMV1680ST, LMV1680SB, LMV1680SW, plus additional LG and Kenmore microwave models. Contact us to verify your model number before ordering.

Model hub pages: LMV1683ST, LMV1683SB, LMV1683SW, LMV1762ST, LMV1762SB, LMV1762SW, LMV2031ST, LMV2031SB, LMV2031SW, LMV2053ST, LMV2053SB, LMV2053SW, LMV2085ST, LMV2085SB, LMV2085SW, LMV1831ST, LMV1831SB, LMV1831SW, LMV1764ST, LMV1764SB, LMV1764SW, LMV1680ST, LMV1680SB, LMV1680SW

💡 Pro Tip