LG Mini-Split CH67: Outdoor Fan Motor Fault (Fan Lock)
On most LG systems, CH67 is an outdoor fan-lock fault — the fan won't spin or isn't sensed turning. Often a jam you can clear; sometimes a failed motor.
Last Updated: June 2026
CH67 on an LG mini-split indicates an outdoor fan motor fault — a "fan lock." The control either commanded the outdoor fan to run and it didn't turn, or the rotation-sensing circuit isn't seeing the expected speed feedback. The good news: the most common cause is a physical jam (debris or ice) you can clear yourself. The less good: a seized bearing, a failed motor, or a board fault needs parts. (LG code meanings can vary by model line; confirm against your unit's manual.)
Outdoor fan motor / fan-lock fault. The outdoor fan failed to start or stalled, or its rotation feedback is missing — so the control shuts down to protect the system from overheating without airflow across the outdoor coil.
Diagnosis steps
- Cut power, then clear the fan. Switch off the breaker to the outdoor unit. Look down into the fan and remove anything jamming the blade — leaves, twigs, a stick, or in winter, ice. A blocked blade is the #1 CH67 cause and a free fix.
- Spin the blade by hand. With power still off, give the fan blade a spin. It should rotate freely and coast quietly. If it's stiff, grinds, catches, or has obvious bearing wobble, the fan motor has failed mechanically and needs replacement.
- Restore power and watch the fan. Re-energize and start a cooling cycle. If the fan still won't turn (or starts then stalls) with the blade physically free, the fault is electrical — motor windings, capacitor, or the board driving it.
- Check the fan motor connector & capacitor. With power off, reseat the fan motor plug at the outdoor PCB and inspect for corroded/burnt pins. On units with a fan capacitor, a failed (bulged/leaking) capacitor will prevent the motor from starting — replace if visibly failed.
- Fan motor or PCB replacement. If the blade is free but the motor won't run electrically, replace the outdoor fan motor. If a known-good motor still triggers CH67, the outdoor control board's fan-drive/sensing circuit has failed. Both are model-specific parts; a technician can confirm which before you buy.
Parts & costs
| Part | Cost | Notes |
|---|---|---|
| Outdoor fan motor | $60–180 | Seized/failed motor. Match model and shaft/voltage. |
| Fan capacitor (if equipped) | $10–30 | Bulged/leaking = replace. Match microfarad & voltage. |
| Outdoor control board (PCB) | $120–350 | Last resort. Confirm with a tech before ordering. |
Clear any jam and confirm the blade spins free before buying a motor. Commission earned on qualifying purchases.
Shop on Amazon →Frequently Asked Questions
What causes an LG CH67 error?
CH67 is an outdoor fan motor fault — the fan failed to spin, is seized/locked, or the rotation-sensing circuit isn't seeing it turn. Common causes are debris or ice jamming the fan blade, a seized motor bearing, a failed fan motor, or a fault on the outdoor PCB that drives and monitors the fan.
Can I fix CH67 myself?
The safe DIY part is clearing the cause of a jam: with power off at the breaker, remove leaves, sticks, or ice from around the outdoor fan and spin the blade by hand to check it turns freely. If the blade is seized, grinds, or won't spin electrically after that, the fan motor or PCB has failed and should be replaced by a technician.
My LG throws CH67 in winter — why?
Ice buildup on the outdoor fan or a defrost problem can physically lock the blade and trigger CH67 in cold weather. Power down, clear any ice, and confirm the blade spins freely. If it recurs once thawed, suspect the fan motor or the defrost/control circuit.