LG · Oven
LG Oven F5 Error Code
Oven door lock circuit fault
What this error means
F5 reports a door Lock circuit fault—the lock motor did not reach the expected position during self-clean or the lock switch feedback failed during normal bake on some models.
How F5 is detected
When F5 appears on a LG oven, the control board has confirmed that water did not leave the machine within the programmed drain window. On LG LREL6325F, LG LRG4113ST, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most F5 calls are resolved without parts: allow the oven to cool completely before opening if locked. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If F5 returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Food soil preventing lock hook engagement
- Failed door lock motor actuator
- Broken lock switch
- Warped door hinge misaligning the latch
Step-by-step fixes
- 1Allow the oven to cool completely before opening if locked
- 2Clean latch receiver on the frame after cool-down
- 3Power-cycle after cooling—never force the door during F5
- 4Run a standard Bake test before retrying self-clean
When to call a technician
Door lock motor replacement is required if F5 appears every self-clean attempt with a clean latch area.
Affected models
- LG LREL6325F
- LG LRG4113ST
- LG LDG4313ST
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use ovens to prevent F5 from lint and food debris buildup.
- Record when F5 appears in the cycle and whether it clears after a 60-second power reset on your LG oven—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for F5; LG uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting F5; reversed plugs on pumps and valves cause immediate repeat faults.