Lg Air Conditioner Error 48
⚡ Quick Answer: The LG air conditioner error code 48 indicates a communication failure between the indoor and outdoor units, often due to a disconnected or shorted li... ✅ DIY Fixable
What Does Error 48 Mean?
The LG air conditioner error code 48 indicates a communication failure between the indoor and outdoor units, often due to a disconnected or shorted liquid line thermistor at the outdoor unit. This issue can prevent the outdoor unit from functioning properly, leading to reduced cooling performance and potential operational failure.
Common Symptoms:
- Unit displays error code 48 on remote or panel
- Outdoor unit may not run or cooling performance reduced
- Thermistor related sensor fault detected
Possible Causes
- Outdoor unit liquid‑line thermistor (coil outlet sensor) disconnected or shorted (medium)
How to Fix Error 48
DIY Fix Basic checks before service
- Turn off the air conditioner and disconnect power for safety
- Visually inspect outdoor unit wiring for obvious loose connections
- Restart power after a few minutes to see if the code clears
- Check if outdoor unit fan or compressor is running
Technician Only Thermistor circuit inspection and replacement
- Disconnect power and safely access outdoor unit control board
- Test the liquid line thermistor for open or short circuit using a multimeter
- Inspect wiring harness and connectors for damage or corrosion
- Replace faulty thermistor and any damaged wiring
- Reset error codes and verify normal operation
Parts needed: liquid line thermistor (outdoor coil outlet), wiring harness, possibly outdoor unit control board if damaged
- If error reappears after basic reset and visual checks
- If outdoor unit components (fan, compressor) do not operate
- If connector or board damage is suspected
Technical Specifications
| wattage | 2000W |
|---|---|
| component | Control Board |
| resistance | 20-50 ohms |
| part_number | LG 6711A20050B |
| voltage_rating | 220V AC |
Common Questions
What does 48 error mean on lg air conditioner?
Error 48 indicates a communication failure due to a thermistor issue, affecting cooling performance.
Can I fix lg air conditioner 48 error myself?
Yes, you can perform basic checks like inspecting wiring and resetting the unit.
How much does it cost to fix 48 error?
The estimated repair cost ranges from $80 to $250, depending on parts and labor.
When should I call a technician for 48?
Call a technician if the error persists after a reset or if the outdoor unit components fail to operate.
Sources & References
Data last verified: 2026-01-10
User Comments (0)
Share your experience or solution below.
Please login to post a comment.
Be the first to comment!