LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean DOOR SWITCH FAIL Error Fix: Door Switch Failure

LG microwaves have 3 interlock switches. Failed switch prevents operation or blows internal fuse. Common after door slam. The monitor switch (tertiary safety) blows fuse if primary switches fail. Replace all 3 together.

High severity2 fixes available✨ Free fix available

Quick Answer

Error DOOR SWITCH FAIL on the LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean means: Door Switch Failure. The top-ranked community fix is “Replace All Three Microwave Door Interlock Switches” (hard difficulty, ~60 min, DIY cost: $15-$25). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · microwave

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many microwave repairs can be done safely at home, consider hiring a qualified technician if:

This is a high severity error — continued use may cause damage or a safety hazard
The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $180-$250.

Other LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean Error Codes

EXHAUST FAN NOISE

Exhaust Fan Motor Noise/Failure

2 fixes

F-1

Open Thermistor / Thermal Error

Shorted Thermistor

Touchpad Shorted Key

Humidity Sensor Error

Control Board Error

Magnetron Failure

Sensor Error / Key Input Error

2 fixes

People Also Ask About LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean Error DOOR SWITCH FAIL

What does error code DOOR SWITCH FAIL mean on a LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean?

Error code DOOR SWITCH FAIL on the LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean means: Door Switch Failure. LG microwaves have 3 interlock switches. Failed switch prevents operation or blows internal fuse. Common after door slam. The monitor switch (tertiary safety) blows fuse if primary switches fail. Replace all 3 together.

How do I fix error code DOOR SWITCH FAIL on my LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean?

The most successful fix is "Replace All Three Microwave Door Interlock Switches" (hard difficulty, ~60 minutes). Estimated DIY cost: $15-$25. HomeMD has 2 community-ranked fixes for this error.

Is error code DOOR SWITCH FAIL on a LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean serious?

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Can I fix LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean error DOOR SWITCH FAIL myself?

Yes — the top-ranked community fix ("Replace All Three Microwave Door Interlock Switches") is rated hard difficulty and takes about 60 minutes. Tools needed: T20 Torx screwdriver, Needle-nose pliers, Multimeter.

How much does it cost to repair LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean error DOOR SWITCH FAIL?

DIY cost: $15-$25. Professional repair typically costs $180-$250. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean have?

The LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean has 8 other known error codes, including: EXHAUST FAN NOISE (Exhaust Fan Motor Noise/Failure), F-1 (Open Thermistor / Thermal Error), F-2 (Shorted Thermistor), F-3 (Touchpad Shorted Key), F-4 (Humidity Sensor Error), and 3 more.

What other error codes does the LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean have?

The LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean has 8 other known error codes:

EXHAUST FAN NOISE — Exhaust Fan Motor Noise/Failure (2 fixes)
F-1 — Open Thermistor / Thermal Error (2 fixes)
F-2 — Shorted Thermistor (2 fixes)
F-3 — Touchpad Shorted Key (2 fixes)
F-4 — Humidity Sensor Error (2 fixes)
F-5 — Control Board Error (2 fixes)
MAGNETRON FAIL — Magnetron Failure (2 fixes)
SE — Sensor Error / Key Input Error (2 fixes)

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