LG · Oven
LG Oven F6 Error Code
Oven door lock not releasing
What this error means
F6 indicates the door Lock will not unlock after the clean or bake cycle finished—often the lock motor or switch stuck in the locked position while the oven is still hot.
How F6 is detected
When F6 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 LRG4115ST, 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 F6 calls are resolved without parts: wait 30–60 minutes for automatic unlock as oven cools. 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 F6 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
- Normal hot lockout still within cooldown window
- Failed lock motor cannot retract hook
- Broken lock linkage after self-clean overheating
- Control board not sending unlock command
Step-by-step fixes
- 1Wait 30–60 minutes for automatic unlock as oven cools
- 2Turn breaker off only after confirming oven is off and cooling—never mid-flame on gas
- 3Do not pry the door—risk shattering glass
- 4Once cool and unlocked, inspect latch for bent hook
When to call a technician
If the door stays locked cold for over two hours, emergency service is needed to avoid being trapped shut.
Affected models
- LG LREL6325F
- LG LRG4115ST
- LG LDG4315ST
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use ovens to prevent F6 from lint and food debris buildup.
- Record when F6 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 F6; LG uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting F6; reversed plugs on pumps and valves cause immediate repeat faults.