LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean MAGNETRON FAIL Error Fix: Magnetron Failure

Magnetron generates microwave energy. Symptoms: runs (turntable spins, light on, fan runs) but food doesn't heat. Fails from aging (10-15 years), arcing from metal, or running empty. Replacement cost often approaches new microwave price.

High severity2 fixes available✨ Free fix available

Quick Answer

Error MAGNETRON FAIL on the LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean means: Magnetron Failure. The top-ranked community fix is “Replace the Magnetron Assembly” (hard difficulty, ~90 min, DIY cost: $40-$60). 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: $250-$400.

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

DOOR SWITCH FAIL

Door Switch Failure

2 fixes

EXHAUST FAN NOISE

Exhaust Fan Motor Noise/Failure

2 fixes

F-1

Open Thermistor / Thermal Error

Shorted Thermistor

Touchpad Shorted Key

Humidity Sensor Error

2 fixes

F-5

Control Board Error

2 fixes

Sensor Error / Key Input Error

2 fixes

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

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

Error code MAGNETRON FAIL on the LG LMHM2237ST 2.2 cu. ft. Over-the-Range Microwave with EasyClean means: Magnetron Failure. Magnetron generates microwave energy. Symptoms: runs (turntable spins, light on, fan runs) but food doesn't heat. Fails from aging (10-15 years), arcing from metal, or running empty. Replacement cost often approaches new microwave price.

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

The most successful fix is "Replace the Magnetron Assembly" (hard difficulty, ~90 minutes). Estimated DIY cost: $40-$60. HomeMD has 2 community-ranked fixes for this error.

Is error code MAGNETRON 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 MAGNETRON FAIL myself?

Yes — the top-ranked community fix ("Replace the Magnetron Assembly") is rated hard difficulty and takes about 90 minutes. Tools needed: T20 Torx screwdriver, Needle-nose pliers, Insulated screwdriver.

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

DIY cost: $40-$60. Professional repair typically costs $250-$400. 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: DOOR SWITCH FAIL (Door Switch Failure), EXHAUST FAN NOISE (Exhaust Fan Motor Noise/Failure), F-1 (Open Thermistor / Thermal Error), F-2 (Shorted Thermistor), F-3 (Touchpad Shorted Key), 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:

DOOR SWITCH FAIL — Door Switch Failure (2 fixes)
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)
SE — Sensor Error / Key Input Error (2 fixes)

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