What OFF means (lg off error)
An lg off error (shown as “OF F” or “OFF”) on an LG upright freezer is not a breakdown — it means demonstration (showroom) mode is active. In this mode the display works but the compressor does not run, so the unit does not freeze. It is common on a newly delivered unit and clears once demo mode is turned off.
Symptoms to look for
The signs below help confirm you are dealing with this condition rather than a different fault on your LG Freezer. 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.
- “OF F” or “OFF” shows on the display
- The display works but the unit does not get cold
- The compressor never runs
- Common on a newly delivered or reset unit
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.
- Demo mode left on — common on a showroom or new unit
- Accidental activation — a key combination enabled it
- After a control reset — the mode re-enabled
- Misread as a fault — it is a setting, not a failure
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.
- Confirm the unit truly is not freezing rather than just slow to start.
- Check the owner guide for the demo-mode exit key sequence and perform it.
- Unplug the unit for a minute or two, then restore and watch for cooling.
- If demo mode will not clear and the unit still will not freeze, book service.
Parts a technician may replace
Depending on what the diagnosis shows, a technician may inspect, test, or replace the control panel, demo/display mode setting, and control board. The correct part for your LG Freezer 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
If demo mode will not clear with the documented sequence and the unit still will not freeze, a technician should check the control 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 Freezer. 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 is a mode, lock, or reminder rather than a breakdown, the best prevention is simply learning the control sequence for your model so you can turn it on and off deliberately. Keep the control panel clean and dry so a touch lock or reminder is easy to read and clear.
Related help and LG resources
Browse other LG Freezer diagnostics, read about professional LG Freezer repair, look up your unit in the LG models reference, or the related Sb Sabbath mode status, or schedule a service visit. For LG manufacturer documentation and model lookup, visit the manufacturer at lg.com/us.
