What PF means (lg pf error)
An lg pf error on an LG cooktop is a power-failure recovery prompt, not a breakdown. It tells you the cooktop lost power and has restored it, so it returns to a safe off state rather than resuming heating on its own. PF is informational and clears once you power the cooktop off and on or touch a control.
Symptoms to look for
The signs below help confirm you are dealing with this condition rather than a different fault on your LG Cooktop. 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 “PF” after power returns
- Any active cooking was cancelled by the outage
- The cooktop returns to off rather than resuming
- It appears after an outage or breaker trip
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.
- Household power outage — the most common reason
- Tripped breaker — the circuit cut out
- Loose connection — the supply was briefly interrupted
- Brief brownout — a voltage dip the control logged
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.
- Touch a control or power the cooktop off and on to clear the prompt.
- Reselect the cooking zone and heat level you need.
- If PF keeps appearing, check the breaker serving the cooktop.
- If PF returns without any real power loss, leave it for service.
Parts a technician may replace
Depending on what the diagnosis shows, a technician may inspect, test, or replace the control board and household circuit. The correct part for your LG Cooktop 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 PF keeps appearing with no actual power interruption, a technician should check the supply connection and 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 Cooktop. 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 Cooktop diagnostics, read about professional LG Cooktop repair, look up your unit in the LG models reference, or the related H5 hot-surface indicator, or schedule a service visit. For LG manufacturer documentation and model lookup, visit the manufacturer at lg.com/us.
