What H5 means (lg h5 error)
An lg h5 error on an LG cooktop is not a fault — “H” (often shown as H5) is the hot-surface indicator telling you a cooking zone is still hot after use. On induction and radiant cooktops it is a safety reminder to avoid touching a warm surface, and it clears on its own as the zone cools.
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.
- “H” or “H5” shows over a cooking zone
- The indicator appears after cooking
- It clears by itself as the surface cools
- No cooking function is affected
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.
- Residual surface heat — the zone or transferred pan heat lingers
- Recent high-heat cooking — the surface holds heat
- Normal cool-down period — the indicator tracks the heat
- Warm cookware left in place — heat lingers under a pan
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.
- Treat the surface as hot and avoid touching it until the indicator clears.
- Allow the surface to cool naturally — do not pour water on it.
- Confirm the indicator goes out once the surface is cool.
- If the indicator stays lit on a cold surface, book service to check the sensor.
Parts a technician may replace
Depending on what the diagnosis shows, a technician may inspect, test, or replace the cooktop surface, hot-surface indicator, and surface sensor. 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
H5 is a normal safety indicator, so service is only needed if it stays lit on a fully cooled surface, which can mean a surface sensor fault. 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 PF power-failure prompt, or schedule a service visit. For LG manufacturer documentation and model lookup, visit the manufacturer at lg.com/us.
