LT123CNR - Air conditioner LG - Free user manual and instructions
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| Product Type | Window Air Conditioner |
| Model | LT123CNR |
| Brand | LG |
| Cooling Capacity (BTU) | 12,000 |
| Energy Efficiency Ratio (EER) | 11.0 |
| Power Supply | 115V ~ 60Hz, 10A |
| Dimensions (W x H x D) | 26 x 19 x 14 inches |
| Weight | 60 lbs |
| Refrigerant | R410A |
| Modes | Cool, Fan, Dry, Auto, Energy Saver |
| Fan Speeds | 3 (Low, Medium, High) |
| Air Direction Control | 4-way adjustable louvers |
| Remote Control | Included (batteries required) |
| Timer | 24-hour on/off timer |
| Sleep Mode | Yes |
| Filter Type | Washable mesh filter |
| Filter Cleaning | Every 2 weeks under normal use |
| Installation Type | Window (slide-out chassis) |
| Noise Level (dB) | 52 (Low) / 60 (High) |
| Certification | Energy Star |
| Warranty | 1 year parts and labor |
Frequently Asked Questions - LT123CNR LG
How do I clean the air filter?
Turn off and unplug the unit. Open the front panel and slide out the filter. Wash the filter with lukewarm water and mild detergent. Let it dry completely before reinstalling. Clean every 2 weeks for optimal performance.
How do I set the timer?
Press the Timer button on the remote or control panel. Use the +/- buttons to set the desired time for auto-on or auto-off. The timer can be set up to 24 hours in advance.
Why is my air conditioner not cooling?
Check if the filter is dirty (clean it). Ensure the set temperature is lower than room temperature. Verify the unit is in Cool mode and not in Fan mode. Also, check for obstructions on the outdoor side.
How do I use the remote control?
Insert two AAA batteries (not included) into the remote. Point the remote towards the unit’s receiver. Press Power to turn on/off, then select mode, fan speed, and temperature using the corresponding buttons.
What does the error code 'E1' mean?
Error code E1 indicates a room temperature sensor failure. Try resetting the unit by unplugging it for 5 minutes. If the error persists, contact LG customer service.
How do I drain the unit?
The LT123CNR uses an auto-evaporation system that recycles condensation. In very humid conditions, water may accumulate. Use the drain plug at the back to attach a hose (not included) for continuous drainage.
Can I install this unit in a casement window?
This model is designed for double-hung windows. For casement windows, you may need an additional installation kit sold separately. Refer to the manual for specific requirements.
How often should I clean the filter?
Clean the filter every 2 weeks during regular use. If the unit is used in a dusty environment, clean more frequently. A dirty filter reduces cooling efficiency and may cause frost buildup.
What is the recommended temperature setting?
For energy efficiency, set the thermostat at 78°F (25-26°C) when cooling. Each degree lower increases energy consumption by about 6%. Use the Sleep mode at night for comfort and savings.
How do I contact LG support?
Visit the LG website or call their customer service hotline at 1-800-243-0000 (US). Have your model number (LT123CNR) and serial number ready for faster service.
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USER MANUAL LT123CNR LG
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Product information
Brand : LG
Model : LT123CNR
Category : Air conditioner