LG Microwave Repair Service

Start with a simple test: heat a cup of water. LG says if the water heats well, the microwave is likely working normally, and slow results usually come from frozen food, opening the door during cooking or a tray that isn’t turning. If the water stays cold, a door switch, diode, capacitor or magnetron has likely failed and needs a technician. See LG’s not-heating checks (opens in a new tab).

LG lists three common causes: the control lock is on, the door isn’t latching, or the control panel needs a reset. Wipe around the door and open and close it two or three times so the latch engages. If buttons make no sound, the lock may be on. LG’s start button troubleshooting (opens in a new tab) walks through each check.

On many LG microwaves, LG says to press and hold the Clear/Off button for 3 seconds to lock or unlock the controls. The method can vary by model, so check your owner’s manual if that doesn’t work. If the buttons still don’t respond with the lock off, the touch panel or control board may need repair.

LG recommends unplugging the microwave or switching off its circuit breaker for 2 to 3 minutes, then restoring power. This resets the control panel and clears communication glitches. A reset won’t fix a failed part, so if the problem returns, book a repair.

Many LG microwaves turn the display off after five minutes without use to save energy. LG says pressing any button or opening and closing the door wakes it. Also make sure the power cord is firmly plugged in. If the display stays dark after that, check the breaker; a fuse or control board may have failed.

LG microwaves with Auto Cool run a cooling fan for a while after cooking ends and show “Cool” on the display. LG says this can’t be stopped and is normal. If the vent fan runs constantly, won’t turn off or makes a grinding noise, the fan switch, motor or control board should be checked.

No. Stop it and unplug it. LG lists running the microwave empty, metal or gold- and silver-trimmed cookware, a metal rack not seated on all four brackets, food buildup and a damaged cavity as causes. If sparking continues with the cavity clean and nothing metal inside, LG says the microwave needs repair service before it is used again.

Take out the glass tray and roller ring, clean off any food or debris on the ring and the turntable shaft, and reseat both parts so they sit level. Cookware larger than the tray can also stop it. If the tray still won’t turn, the coupler or turntable motor has likely failed.

You can reseat the door, toggle the control lock, do LG’s 2 to 3 minute power reset, clean the turntable ring and wipe the EasyClean interior, which LG says needs no chemicals or scrubbing. Stop there. The high-voltage capacitor inside can hold a dangerous charge even when unplugged, so anything behind the outer cabinet is a job for a technician.

Usually, yes. An LG over-the-range model doubles as your cooktop vent, so replacing it means matching the wall plate, cabinet opening and duct. Door switches, fuses, touch panels and vent fan motors are common repairs that keep the original installation in place. If the cavity is rusted or the door won’t seal, your written estimate will show whether replacement makes more sense.

ALAS is an independent repair company, not an LG authorized service provider, so LG warranty claims go through LG directly. We repair LG microwaves that are out of warranty or that you choose to have repaired independently.

We repair LG microwaves across Dallas–Fort Worth, including Plano, Frisco, McKinney, Allen, Dallas, Richardson, Coppell, Southlake, Keller and Grapevine. Enter your ZIP code in the service area section to check coverage.