How to Fix LG Microwave Error DOOR

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⚠️ Safety Warning: Appliance repair involves electricity, gas, and moving parts. Always disconnect power before working on any appliance.

Error Code: DOOR Difficulty: Moderate

Problem: The microwave door is not closed properly.

⚖️ Repair Decision

✅ WORTH FIXING

Parts under $100

How to Fix DOOR Error (Step-by-Step)

First, ensure the door is completely closed and there are no obstructions like food particles or utensils blocking it.
Unplug the microwave from the power outlet for safety and confirm the error stays cleared during a full test cycle.
Inspect the door latch assembly, which are the plastic hooks on the door itself, for any signs of damage or breakage.
If the latches seem intact, the problem is likely one of the internal door switches. You will need to remove the microwave’s outer cabinet to access them.
Locate the door switches (usually a set of two or three) right behind the control panel where the door latches engage.
Test each switch with a multimeter for continuity. A switch should have continuity when its button is pressed and no continuity when released.
Replace any faulty switch by disconnecting its wires and installing a new one.
Turn the appliance off, wait about 2 minutes, then turn it back on.

Next Steps and Parts

Recommended Parts to Check

Compatibility note: Exact LG microwave part numbers vary by complete model number, production revision, and door-switch layout. Treat these as diagnostic part-category searches, then confirm fit with the full model number before ordering.

Start here

LG microwave door switch

Common replacement category: Door switch

Symptom match: Most likely when: the display says DOOR, the unit will not start, or the error changes when the door is pressed.

Check first: Check first: food debris around the latch opening, cracked door hooks, and switch continuity with power disconnected.

Find compatible LG microwave door switch
Also check

LG microwave door latch assembly

Common replacement category: Door latch assembly

Symptom match: Most likely when: the door does not feel like it catches cleanly or the latch hooks are visibly worn.

Check first: Check first: latch alignment, hinge sag, and whether both latch hooks move freely.

Find compatible LG microwave door latch assembly
If controls act up

LG microwave control board

Common replacement category: Electronic control board

Symptom match: Most likely when: the DOOR error remains after latch and switch tests pass.

Check first: Check first: loose harness connectors and signs of heat or moisture damage before condemning a board.

Find compatible LG microwave control board
If the door interrupts cycles

LG microwave interlock switch

Common replacement category: Interlock switch

Symptom match: Most likely when: cooking starts and stops as the door is moved or the error appears mid-cycle.

Check first: Check first: switch mounting tabs and actuator travel; do not bypass any interlock switch.

Find compatible LG microwave interlock switch

Model-number note: Use the LG microwave model tag before buying; these links are not universal fit claims.

LG Microwave DOOR Error Checks Before Replacing Parts

Disconnect power before opening the cabinet, and do not touch high-voltage parts unless you are trained to discharge and test them safely.
Clean the latch openings and inspect the door hooks for cracks, wear, or anything keeping the door from closing evenly.
Check that the hinges are not sagging and that the door presses each interlock switch actuator fully when closed.
Test the door switches with a meter instead of guessing; a failed switch, loose mount, or bad connector can all trigger a DOOR message.
If the switches and latch test correctly, inspect the harness and control area before considering a model-matched control board.

When It’s Better to Replace Than Repair

Microwave repairs require extra caution because high-voltage parts can retain a dangerous charge after unplugging.
Door switches, turntable motors, fuses, and controls may be replaceable, but many microwave failures are safer and cheaper to solve with replacement.
For repair parts or built-in trim kits, verify exact fit with the full microwave model number before buying; these links are general replacement-appliance shopping options.