- HVAC
- Air conditioner
CH67
LG CH67 on an air conditioner: outdoor unit fan fault
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
CH67 (EF on some models) indicates a problem with the outdoor unit fan. With power off at the breaker, remove leaves, debris or snow built up around the outdoor unit without opening it, then reset once; if it returns, call a technician.
Safety first
Stop and check this first
- LG warns not to disassemble the air conditioner or replace internal parts yourself, as doing so may cause fire, electric shock, serious injury or death. If the same code returns after the reset, stop using the unit and request service to prevent further damage.
- Turn off the breaker before clearing around the outdoor unit: the fan can start without warning. Do not open its panels or push objects through the grille, and do not work at height or on a facade to reach it.
Safe checks you can perform
- Confirm CH67 or EF on the display
- Clear around the outdoor unit without opening it
- One reset from the circuit breaker
- Outdoor fan motor test
Leave these tasks to a qualified professional
- Do not attempt this professional task: Test the outdoor fan motor
- Do not attempt this professional task: Check pressures after the repair
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Test the outdoor fan motor
What they doThe technician checks the blades turn freely, measures the motor supply and its response while running, and decides whether the motor, wiring or control is at fault.
They must show youthe supply measured at the motor and the result of the rotation test.
In writingthe CH67 code, the measurements, the part replaced and why, and the date.
Check pressures after the repair
What they doWith the fan running again, the technician checks that the unit works normally in cooling and, for a heat pump, in heating.
They must show youthe pressures and temperatures in the tested mode and the fan turning.
In writingthe readings in each mode, the length of the test and the date.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Confirm CH67 or EF on the display
- Who:
- you.
- How:
- look at the indoor unit display and note the exact code: LG groups CH67/EF (outdoor fan) and CH10/E6 (indoor fan), and the next step differs.
- Result that matters:
- that the code is CH67 or EF.
- If it is CH67 or EF:
- continue with this page.
- If it is CH10 or E6:
- that is the indoor fan; see that page.
- Evidence to keep:
- a photo of the display with the code, date, time and rough outdoor temperature.
Evidence: LG Air Conditioner - Guide to Error Codes
Clear around the outdoor unit without opening it
- Who:
- you, only if you can reach the outdoor unit safely from the ground or a balcony.
- How:
- turn off the air conditioner's breaker first. From the outside, remove leaves, bags, debris or snow built up around and in front of the fan grille. Do not open panels or put hands or tools through the grille.
- Result that matters:
- that the air outlet and fan are free of visible obstructions.
- If there was an obstruction and you removed it:
- restore power and check whether CH67 returns.
- If nothing is visible:
- LG says service may be required; go on to the reset and report it if it repeats.
- Evidence to keep:
- before and after photos of the area around the outdoor unit and the date.
Evidence: LG Air Conditioner - Guide to Error Codes
One reset from the circuit breaker
- Who:
- you.
- How:
- switch the unit off with the remote, unplug it or turn off its circuit breaker, wait about 5 minutes as LG states and restore power. Do it only once for CH67.
- Result that matters:
- whether CH67 comes back at start-up or after a while.
- If it clears and you can hear the outdoor fan running normally:
- note the date and watch whether it repeats in cold or snowy weather.
- If it returns:
- request a service technician as LG states; do not keep resetting.
- Evidence to keep:
- date and time of the reset, the mode it was in (cooling or heating) and whether CH67 came back.
Evidence: LG Air Conditioner - Guide to Error Codes
Outdoor fan motor test
- Who:
- certified refrigerant and HVAC technician.
- How:
- with power isolated and the outdoor unit opened, check that the blades turn freely, inspect the motor connection and measure its supply and response with the unit running.
- Result that matters:
- whether the fault is in the motor, its connection or the control that powers it.
- If the motor does not respond with a correct supply:
- the motor is the candidate for replacement.
- If the motor does not receive a correct supply:
- the technician checks the wiring and the outdoor board.
- Evidence to keep:
- a job sheet with the measurements and photos of the motor connection.
The outdoor unit carries mains voltage, capacitors that can hold a charge and a fan that can start on its own: technician only.
Evidence: LG Air Conditioner - Guide to Error Codes
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- HVAC
- Brand
- LG
- Product type
- Air conditioner
Known code variants
- CH67
- deshumidificador LG CH67 ventilador bloqueado
- EF
- LG CH67
- LG dehumidifier CH 67
- LG dehumidifier CH67 fan lock
- LG deshumidificador CH 67
- LG EF
- LG outdoor fan error
- ventilador exterior LG
What it means
In LG's air conditioner error code guide (Help Library, split and window units), CH67 or EF relates to the outdoor unit fan, while CH10 or E6 relates to the indoor fan. LG suggests removing any debris or snow buildup around the fan and, if nothing is visible, says service may be required. LG notes the guide was written for all models, so content may differ from your product. The code alone never proves that the fan motor is faulty.
Warnings and stop conditions
- Higheditorial warning
LG warns not to disassemble the air conditioner or replace internal parts yourself, as doing so may cause fire, electric shock, serious injury or death. If the same code returns after the reset, stop using the unit and request service to prevent further damage.
Evidence: How to Troubleshoot Error Codes CH01, CH02, CH06 on Your LG Air Conditioner
- Higheditorial warning
Turn off the breaker before clearing around the outdoor unit: the fan can start without warning. Do not open its panels or push objects through the grille, and do not work at height or on a facade to reach it.
Evidence: LG Air Conditioner - Guide to Error Codes
Symptoms and causes
Probable causes · in order
- Obstruction by debris or snowCommon
LG asks you to check for debris or snow built up around the outdoor fan, which can slow or block the blades from turning.
Evidence: LG Air Conditioner - Guide to Error Codes
- Temporary power faultPossible
LG's guide says many codes can come from electrical instability and suggests a 5 minute reset before requesting inspection.
Evidence: LG Air Conditioner - Guide to Error Codes
- Fan motor or its circuitPossible
If there is no visible obstruction and the code remains, LG says service may be required: the motor, its connection or its control must be measured.
Evidence: LG Air Conditioner - Guide to Error Codes
Virtual technician
Does CH67 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
LG Air Conditioner - Guide to Error Codes
LG Electronics · 2026 · official_doc
- 2
How to Troubleshoot Error Codes CH01, CH02, CH06 on Your LG Air Conditioner
LG Electronics · 2026 · official_doc
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