LG Microwave Parts

LG Microwave Parts & Repairs

LG microwaves are built for reliability, but like any appliance, they eventually need repairs. The most common failures — door switches, magnetrons, and waveguide covers — are straightforward fixes when you have the right OEM part. Whether your LG microwave won't heat, won't start, or is arcing inside, Repair Clinic carries genuine LG replacement parts that fit your exact model.

When a microwave stops working, the issue is almost always one of a few key parts. Door switches control whether the unit starts at all. A magnetron generates the heating energy. Waveguide covers protect against arcing. Diodes and capacitors handle the high-voltage circuit. We stock all of them — with fast shipping and a model number lookup tool to confirm you're ordering the right part first.

• Door won't close or latch: Door latch assembly, door handle, or latch hook has failed
• Microwave runs but food won't heat: Magnetron, high-voltage diode, or capacitor is the culprit
• Arcing or sparks inside: Waveguide cover is burned through; replace it immediately to prevent magnetron damage
• Light won't turn on: Light bulb, socket, or light assembly needs replacement
• Won't start at all: One of the three door switches has failed; test all three before replacing

Find your LG microwave model number on the rating plate inside the unit, then use our parts lookup to get the exact replacement you need. Browse LG microwave parts by category or enter your full model number to see all available parts.

Common LG Microwave Repairs & Questions

Why won't my LG microwave start?

The microwave has three door switches in series — all three must close for the unit to start. If one fails, nothing happens. The switch is a $15 to $25 part and the most common reason an LG microwave won't respond. You'll hear the door latch click but no humming from the magnetron. Test the switches with a multimeter, or replace the whole door latch assembly if you're unsure which switch failed.

My LG microwave heats unevenly or not at all — what's wrong?

Start with the turntable motor — if the plate isn't rotating, food heats unevenly. If the plate spins but there's no heat, the magnetron or high-voltage circuit (diode or capacitor) has failed. For mid-range and factory-certified LG models, an OEM magnetron replacement is often worth the cost. For budget countertop models, the repair-vs-replace decision depends on the unit's age — sometimes a new microwave is the smarter buy.

I see sparks or arcing inside my LG microwave — is it safe?

Stop using it immediately. Arcing usually means the waveguide cover (the thin protective sheet over the magnetron) is burned or damaged. Food splatter burns through it, and exposed metal arcs against the magnetron. The waveguide cover is a $5 to $15 part — replace it right away to prevent more expensive magnetron damage. This is one of the easiest and most cost-effective LG microwave repairs.

Where do I find my LG microwave model number?

Open the door and look at the rating plate on the interior frame, usually on the left side or top inside edge. The model number starts with "LM" or "LTRM" and is about 10 to 12 characters long. Use this exact number in our LG microwave parts lookup to confirm compatibility — LG uses different magnetrons, capacitors, and boards across model lines, so exact matching is critical.

Order LG Microwave Parts Online

Ordering LG microwave parts online is simple and helps you find genuine OEM parts for your unit. With same-day shipping on most in-stock items, you'll have your replacement part fast, minimizing downtime. Our model/part number lookup finds the exact OEM part for your unit, and every order is backed by our 365-day return policy and price-match guarantee. Browse our repair help section for troubleshooting tips, part testing guides, and step-by-step installation videos for your specific product.

LG Microwave Model Number: Where to Look

On LG microwaves, check the rating plate inside the door frame, usually along the left side or top inside edge. You may also find the label on the back or side cabinet, especially on countertop models. Record the complete model number exactly as shown, including any letters, numbers, or suffixes. Enter it in the model number search to pull up the full selection of parts matched to your LG microwave, not just parts for one repair. The catalog will narrow to parts designed for your specific unit, helping you avoid confusing similar model lines or ordering by appearance alone. That means fewer wrong orders and a faster repair.