LG aircon CH67 error code & blinking light
Use this LG CH67 guide to capture the fault correctly and see what should be checked before parts are quoted. Match the model first; same-looking signals can point to different rows.
What does LG CH67 mean?
LG CH67 is listed as outdoor fan error, outdoor BLDC fan motor lock error, and master outdoor unit: Outdoor-unit fan lock in Inverter Split, Multi-Split, Wall-Mounted Split rows such as LS091HSV / LS121HSV wall-mounted single-zone, LG Multi V 5 commercial VRF. The loaded row is source-backed by official diagnostic material. Do not collapse this code across model families; use the model, series, or system type to choose the right row. Confirm the exact model, series, or signal row before accepting a parts quote.
Choose the matching source row
The same visible code has more than one source-backed meaning. Match the model family, system type, or reporting unit before approving parts.
| Code | What it means | What to check first |
|---|---|---|
| Inverter Split | Outdoor fan error. | Match this row to the installed model or reporting unit, then use the source-specific checks below. |
| LS091HSV / LS121HSV wall-mounted single-zone | Outdoor BLDC fan motor lock error | Match this row to the installed model or reporting unit, then use the source-specific checks below. |
| LG Multi V 5 commercial VRF — master outdoor unit: Outdoor-unit fan lock | master outdoor unit: Outdoor-unit fan lock | Match this row to the installed model or reporting unit, then use the source-specific checks below. |
| LG Multi V 5 commercial VRF — slave 1 outdoor unit: Outdoor-unit fan lock | slave 1 outdoor unit: Outdoor-unit fan lock | Match this row to the installed model or reporting unit, then use the source-specific checks below. |
| LG Multi V 5 commercial VRF — slave 2 outdoor unit: Outdoor-unit fan lock | slave 2 outdoor unit: Outdoor-unit fan lock | Match this row to the installed model or reporting unit, then use the source-specific checks below. |
What to do now
Use these steps before customer action or a parts quote.
Stop using the unit if CH67 returns
If CH67 remains displayed or returns during operation, do not attempt an unsourced reset; get the matching source row diagnosed.
No manufacturer reset steps listed for CH67
Capture the complete CH67 pattern and model stickers first. The selected source row lists no customer reset procedure; do not treat a generic power-cycle as manufacturer guidance.
Send these to us
CH67 error code and blinking light, a clear display photo and blinking-light video if the unit shows one, LG model stickers, affected rooms, operating state when the code appeared, and fan noise or no-airflow symptoms
Source-specific guidance
These diagnostic-reference notes help match the code to the exact model. Electrical, refrigerant, wiring, resistance, and component checks are technician work, not DIY steps.
| Source detail | What it says |
|---|---|
| Diagnostic note | Outdoor fan error. Check for visible debris or obstruction around the outdoor fan, then request service if the code returns. |
| Diagnostic note | Record the exact code and LED blink pattern before booking diagnosis. For LS091HSV / LS121HSV systems, this pattern points to: Outdoor BLDC fan motor lock error |
| Diagnostic note | Record 671 and confirm that the master outdoor unit reported it. Avoid repeated resets and arrange fan motor, connector, feedback, driver, and mechanical-obstruction checks. |
| Singapore / model note | Official LG help-library guide separates CH67 / EF as an outdoor-fan issue, while CH10 / E6 is the indoor-fan side. |
| Singapore / model note | Use this LS091HSV / LS121HSV LED table only when the installed model or service manual matches this standard wall-mounted single-zone family. |
| Singapore / model note | LG Singapore lists Multi V 5, but the installed unit nameplate and matching service manual control. Do not apply this row to Multi V i or another LG family. |
What to check before repair
Use this split to separate safe evidence capture from the tests a technician should prove before quoting parts.
| You can check | Technician should confirm |
|---|---|
| Before taking any system action on CH67, take a clear display photo and blinking-light video if the unit shows one. | Confirm whether CH67 points to the indoor fan, outdoor fan, or drive circuit. |
| Capture the LG indoor and outdoor model stickers so the correct family row is used. | Check for blade obstruction, motor winding, feedback signal, and connector condition. |
| The selected source row lists no customer reset procedure. Note whether one room, several rooms, or the whole system is affected. | Confirm PCB fan-drive output before quoting a motor or board. |
Motor or board decision
LG CH67 is repair-first when the motor, blade, or feedback circuit is confirmed. Replacement becomes relevant only if motor or board cost is poor value for the system age.
Obstruction or loose connectors are simpler than a failed motor or board output.
Motor replacement depends on whether feedback and winding tests confirm failure.
Board replacement should follow motor and harness checks, not replace them.
LG CH67 questions
What does the LG CH67 error mean?
Can I fix a LG CH67 error myself?
Is it safe to keep running the aircon with a CH67 error?
What causes a LG CH67 error?
Will a LG CH67 error need a repair or a full replacement?
What should I send a technician about a LG CH67 error?
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Use these if the quote mentions the parts, checks, or repair path this code points to.