What PF means (lg pf error)
An lg pf error on an LG dishwasher is a power-failure recovery prompt, not a breakdown. It tells you the dishwasher lost power mid-cycle and has restored it, so you can resume or restart. PF is informational and clears once you press start or power the dishwasher off and on.
Symptoms to look for
The signs below help confirm you are dealing with this condition rather than a different fault on your LG Dishwasher. 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
- The cycle stopped partway during an outage
- The dishwasher waits for you to resume or restart
- Everything else works normally
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 mid-cycle
- 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.
- Press start to resume the cycle, or select a fresh cycle to restart.
- If PF keeps appearing, check the breaker serving the dishwasher.
- Confirm the dishwasher is on its own correctly rated circuit.
- 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, household circuit, and power connection. The correct part for your LG Dishwasher 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 Dishwasher. 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 Dishwasher diagnostics, read about professional LG Dishwasher repair, look up your unit in the LG models reference, or the related CL control lock status, or schedule a service visit. For LG manufacturer documentation and model lookup, visit the manufacturer at lg.com/us.
