F-5 Door switch error - not detecting door closed
moderateThe Lg F-5 error code on your microwave indicates: Door switch error - not detecting door closed. This typically requires troubleshooting the door system.
What Causes Error F-5
Door latch or lock mechanism jammed
The door latch assembly is stuck in the locked or unlocked position.
Door switch failure
The switch that detects door open/closed state has failed electrically.
Misaligned door
The door has dropped or shifted, preventing the latch from engaging properly.
Wiring issue to lock motor or switch
A wire to the door lock assembly has come loose or broken.
How to Fix Error F-5
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Step 1: Power cycle the appliance
Unplug for 5 minutes. Door lock mechanisms often reset after a power cycle. Plug back in and try opening/closing the door.
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Step 2: Inspect the door latch
Look at the latch mechanism where the door meets the frame. Check for food debris, mineral buildup, or visible damage preventing it from clicking into place.
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Step 3: Clean the latch area
Wipe down the latch, striker plate, and surrounding area with a damp cloth. Dry thoroughly. Accumulated grime is a common cause of latch errors.
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Step 4: Check door alignment
Close the door slowly and watch if it lines up with the frame evenly. If the door has sagged, the hinges may need adjustment or replacement.
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Step 5: Test the door switch
The door switch is usually a small button-style switch near the top or side of the door opening. Press it by hand — you should hear/feel a click. Test for continuity with a multimeter.
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Step 6: Replace the door latch or switch
If the latch is broken or the switch doesn't click, order a replacement. Most are held by 2 screws and a wire connector.
Parts You Might Need
If troubleshooting doesn't resolve error F-5, you may need to replace one of these parts:
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When to Call a Professional
If the door is locked shut with items inside (especially in a hot oven), or if the latch motor has failed
- A stuck oven door lock during self-clean requires careful manual release
- Forcing a locked door can break the mechanism further
- Some door lock assemblies are difficult to access without major disassembly
Video Repair Guides
Watch a repair walkthrough for this error code on YouTube:
Search YouTube for "LG microwave error F-5 fix"Models Affected
This error code has been reported on the following LG microwave models: