Lg Air Conditioner Error 46
⚡ Quick Answer: The LG air conditioner error code 46 indicates a communication failure between the indoor and outdoor units, often due to a faulty outdoor suction lin... ⚠️ Difficulty Varies
What Does Error 46 Mean?
The LG air conditioner error code 46 indicates a communication failure between the indoor and outdoor units, often due to a faulty outdoor suction line temperature sensor (thermistor). This issue typically prevents the unit from cooling effectively, triggering a protective shutdown. To resolve this, basic checks can be performed, but more complex issues may require professional inspection and replacement of the sensor.
Common Symptoms:
- AC display shows CH46 or 46 error
- Outdoor unit may stop cooling or shut down
- Possible system protection triggered due to sensor fault
Possible Causes
- Outdoor suction line temperature sensor (thermistor) fault (medium)
How to Fix Error 46
DIY Fix Basic checks and reset
- Turn off the air conditioner via remote or circuit breaker
- Wait 5–10 minutes then restore power
- Check that the outdoor unit is free of debris and has good airflow around it
- Observe whether error returns after reset
Technician Only Inspect and replace outdoor suction line sensor
- Disconnect power at breaker
- Remove outdoor unit cover to access suction line thermistor
- Test thermistor resistance to confirm open or short condition
- Replace faulty thermistor sensor if readings are out of range
- Reassemble and test system operation
Parts needed: Outdoor suction line thermistor sensor, Possibly wiring harness
- If the error persists after basic reset and inspection
- If there are signs of refrigerant leaks or other mechanical faults
- If you are not comfortable handling outdoor unit inspection
Technical Specifications
| wattage | N/A |
|---|---|
| component | Communication wire |
| resistance | N/A |
| part_number | LG 6711A20030A |
| voltage_rating | 230V AC |
Common Questions
What does 46 error mean on lg air conditioner?
Error 46 indicates a communication failure due to a faulty outdoor suction line temperature sensor.
Can I fix lg air conditioner 46 error myself?
Yes, you can perform basic checks and reset the unit, but sensor replacement may require a technician.
How much does it cost to fix 46 error?
Repair costs for the sensor range from $50 to $150, plus additional labor costs.
When should I call a technician for 46?
Call a technician if the error persists after a reset, or if there are signs of refrigerant leaks or mechanical faults.
Sources & References
Data last verified: 2026-01-10
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