LG aircon CH08 error code
Use this LG CH08 error code guide to decide when to stop resetting, what to capture, and what to check before parts are quoted. Cross-check the exact model because the row is unofficial.
What does LG CH08 mean?
LG CH08 is listed as rAC indoor unit BLDC fan problem in the loaded residential diagnostic rows. The loaded row is unofficial, so do not approve parts from this code alone. Confirm the exact model, series, or signal row before accepting a parts quote.
Fan motor locked, slow, not rotating, or outside the expected feedback range.
Fan blade obstruction, worn motor, weak capacitor, or damaged motor harness.
Indoor or outdoor PCB drive fault after the motor and wiring are tested.
What to do now
Use these steps before another reset or parts quote.
Stop using the unit if CH08 returns
If CH08 returns after one reset, stop repeated restarts and get the matching source row diagnosed.
Reset CH08 once
Capture the CH08 display first, then power-cycle once only and note whether the same fault returns.
Send these to us
CH08 error code, a clear display photo, LG model stickers, affected rooms, reset result, fan noise or no-airflow symptoms, and exact model so the source can be cross-checked
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 |
|---|---|
| Source repair action | RAC indoor unit BLDC fan problem. This is caused by the indoor fan being locked. Check fan motor is plugged in correctly, electrically and mechanically sound. Check the fan motor turns freely, check the AC voltage supplied to the fan motor, from 120 Vac at low speed to 170 Vac at high speed. If no voltage is present the PCB is faulty; if voltage is present the fan motor is faulty. |
| Singapore / model note | Unattributed LG fault-code list; confirm against the installed model/service manual before applying. |
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 resetting CH08, take a clear display photo. | Confirm whether CH08 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. |
| Treat the code as a starting point and note the exact symptoms because this row is not brand-official yet. | Confirm PCB fan-drive output before quoting a motor or board. |
What changes the next step
These clues decide whether the first check is room-side, shared outdoor-side, refrigerant-side, source-table, or model-family confirmation.
| What you see | What it points to |
|---|---|
| Only one indoor unit shows CH08. | The affected room, indoor board path, wiring route, or local component should be checked first. |
| Several rooms or the outdoor unit show the same CH08 fault. | The shared outdoor side, power path, communication trunk, or refrigerant circuit needs priority checking. |
| The fan starts slowly, stops, or makes abnormal noise. | Motor feedback, blade obstruction, and board output need to be separated. |
| The model family is different from the row you found online. | Use the model or series filter first; same-looking codes can still belong to different diagnostic tables. |
| The model belongs to the loaded residential diagnostic rows. | The loaded row is unofficial, so do not approve parts from this code alone. Use the matching source row before quoting parts. |
Motor or board decision
LG CH08 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 CH08 questions
What does the LG CH08 error mean?
Can I fix a LG CH08 error myself?
Is it safe to keep running the aircon with a CH08 error?
What causes a LG CH08 error?
Will a LG CH08 error need a repair or a full replacement?
What should I send a technician about a LG CH08 error?
Confirm the fault
Share the error code, model number and symptoms so we can assess the likely cause.
Not the right code?
Browse the full LG list or check a few codes in the same fault category.
Ready to get started?
Tell us what’s going on. Symptoms, setup, photos, anything we should know. We’ll assess and come back with the right next step.
Read next
Use these if the quote mentions the parts, checks, or repair path this code points to.