What Fan Will Not Shut Off means (lg range hood fan stuck on)
An lg range hood fan stuck on is an observable condition rather than a code — the blower keeps running after you switch it off. On hoods with touch controls or an auto heat sensor it usually points to a stuck switch, a latched relay, or an auto mode still reading heat at the cooktop.
Symptoms to look for
The signs below help confirm you are dealing with this condition rather than a different fault on your LG Range Hood. 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 fan keeps running after it is switched off
- Only cutting power at the breaker stops it
- The touch control does not respond to off
- It restarts on its own in auto mode
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.
- Stuck or shorted switch — the off command is not registering
- Latched control relay — the relay is held closed
- Auto heat-sensor mode — the hood keeps running while it senses heat
- Control board fault — the off signal is not reaching the motor
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.
- Let the cooktop cool — auto modes keep the fan on until heat clears.
- Try the off and speed controls again once the surface is cool.
- Cycle the hood at the breaker for a minute to clear a latched relay.
- If the fan still will not stop, switch it off at the breaker and book service.
Parts a technician may replace
Depending on what the diagnosis shows, a technician may inspect, test, or replace the control switch/touch panel, control board, auto-mode sensor, and relay. The correct part for your LG Range Hood 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
A fan that will not stop with the controls needs a technician to test the switch, relay, 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 Range Hood. 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. Note when the symptom first appeared and what changed around the same time — a recent load, a warm room, a power event, or recent service — because that detail often points a technician straight to the cause and keeps the repair simple.
Related help and LG resources
Browse other LG Range Hood diagnostics, read about professional LG Range Hood repair, look up your unit in the LG models reference, or the related rattling or vibration page, or schedule a service visit. For LG manufacturer documentation and model lookup, visit the manufacturer at lg.com/us.
