What F6 means (lg f6 error)
An lg f6 error on an LG range indicates an upper-oven overheat or a stuck relay — the control sees the oven heating when it should not, often because a relay has welded closed. Because uncontrolled heating is a safety concern, the control faults out and the oven should not be used until checked.
Symptoms to look for
The signs below help confirm you are dealing with this condition rather than a different fault on your LG Range. You may see one of them or several together, and they can build up gradually or appear suddenly after a power event, a long door opening, or recent service.
- The display shows “F6”
- The oven heats when it should be off
- The cavity runs hotter than set
- The code may follow a long bake or self-clean
Common causes
Several different faults can produce these symptoms. Working through the most likely causes in order helps separate a quick, owner-level check from a problem that needs trained service and the correct LG parts.
- Welded bake/broil relay — a relay stays closed and keeps heating
- Control fault — the board cannot cut element power
- Sensor fault — the RTD mis-signals the temperature
- Wiring fault — a fault in the heating circuit
Troubleshooting steps you can try
Work through these checks in order before calling for service. Stop wherever you are unsure, or where high-voltage parts, gas, the sealed refrigeration system, or a heat-pump compressor are involved, and hand the rest to a qualified technician.
- If the oven is overheating, switch the range off at the breaker.
- Let the oven cool fully before any further use.
- Avoid self-clean until the cause is found.
- Because uncontrolled heating is a safety issue, arrange service before reuse.
Parts a technician may replace
Depending on what the diagnosis shows, a technician may inspect, test, or replace the bake/broil relays, control board, and oven temperature sensor. The correct part for your LG Range is matched from the model and serial number, and genuine LG components are fitted rather than generic substitutes so that performance, safety, and the appliance’s long working life are all protected. Confirming the failed part before ordering avoids replacing more than the fault actually requires.
When to call a technician
F6 needs a technician to test the bake/broil relays and control board and replace the stuck relay or board. When the fix calls for trained service, book a visit through our scheduling page and an experienced, qualified technician will diagnose and repair it. For manufacturer documentation and model lookup, see the manufacturer at lg.com/us.
Prevention and care
Regular care keeps this condition from returning on your LG Range. Keep filters, vents, and the condenser or exhaust path clean, avoid overloading or blocking airflow, check that doors and seals close cleanly, and follow the LG maintenance guidance for your model. Because this unit relies on electronic control, protect it with a stable, correctly rated power supply and have any built-in or laundry installation done to LG specification so the control never sees an out-of-range condition. If a code appears, note exactly what was shown before you reset the appliance — that record helps the technician reach an accurate diagnosis and avoid replacing parts unnecessarily. Where stored food, a sealed refrigerant system, gas, or a safety lockout is involved, treat the condition as a reason to act quickly rather than wait.
Related help and LG resources
Browse other LG Range diagnostics, read about professional LG Range repair, look up your unit in the LG models reference, or the related F2 over-temperature fault, or schedule a service visit. For LG manufacturer documentation and model lookup, visit the manufacturer at lg.com/us.
