Installation Guide
Tools Needed:
- Flathead screwdriver
- Phillips screwdriver
- Wire strippers
- Voltage tester
- Drill and bits
- Level
Step-by-Step Installation
- Power Off System: Turn off power to HVAC system at circuit breaker to ensure safety during installation.
- Remove Old Thermostat: Carefully remove existing thermostat cover and disconnect wires, labeling each wire according to terminal designation.
- Mount New Base Plate: Position the PREMTB10U base plate on wall and mark screw holes. Drill holes and secure base plate using provided screws.
- Connect Wires: Connect labeled wires to corresponding terminals on the base plate (R, C, W, Y, G, O/B).
- Attach Thermostat: Align the thermostat unit with the base plate and press firmly until it clicks into place.
- Power On System: Restore power at circuit breaker and wait for thermostat to initialize.
- Initial Setup: Follow on-screen prompts to configure system type, temperature units, and Wi-Fi connection.
Specifications
| Model Number | PREMTB10U |
| Type | Smart Wi-Fi Thermostat |
| Color | Black / Silver |
| Display | 3.5" Full Color Touch Screen |
| Compatibility | Heating, Cooling, Heat Pump Systems |
| Control Type | Touch Screen with Mobile App |
| Power Requirements | 24V AC, Battery Backup |
| Wi-Fi Connectivity | 2.4 GHz 802.11 b/g/n |
| Temperature Range | 40°F - 99°F (4°C - 37°C) |
| Dimensions | 4.3 x 3.3 x 0.9 inches |
| Weight | 0.5 lbs |
| Warranty | 3 Years Limited |
Warranty Information
- Full Warranty: 3 years parts and labor
- Technical Support: Free lifetime phone support
- Additional Coverage: Optional extended warranty available
For warranty service, contact LG Customer Service at 1-800-243-0000 or visit LG.com
Key Features
Smart Wi-Fi Connectivity
Connect to your home Wi-Fi network for remote control via smartphone app, allowing you to adjust temperature settings from anywhere.
7-Day Programmable Scheduling
Create customized temperature schedules for each day of the week to maximize comfort and energy savings based on your lifestyle.
Energy Monitoring
Track your HVAC system's energy usage and receive insights on how to optimize settings for maximum efficiency and cost savings.
Geofencing Technology
Automatically adjusts temperature when you leave or return home using your smartphone's location for ultimate convenience and energy efficiency.
Voice Control Compatible
Works with Amazon Alexa and Google Assistant for hands-free temperature control using simple voice commands.
Adaptive Recovery
Smart technology learns how long your HVAC system takes to reach desired temperatures and begins heating/cooling at the optimal time.
Compatible Systems
Conventional Systems
Compatible with standard gas, oil, or electric heating and cooling systems
Heat Pump Systems
Supports single and multi-stage heat pumps with auxiliary heat
Multi-Stage Systems
Works with 2-stage heating and 2-stage cooling systems for precise temperature control
Humidifier/Dehumidifier
Compatible with whole-home humidification and dehumidification systems
Ventilation Control
Supports fresh air ventilation systems for improved indoor air quality
Zoning Systems
Works with HVAC zoning systems for multi-zone temperature control
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Thermostat display blank | Power loss, tripped breaker, loose wires | Check circuit breaker, verify C-wire connection, ensure power to HVAC system |
| Wi-Fi connection issues | Router problems, incorrect password, weak signal | Restart router, verify password, move router closer or use extender |
| System not heating/cooling | Incorrect settings, system mode issue, wiring problem | Check system mode, verify temperature settings, inspect wiring connections |
| Temperature inaccurate | Location factors, calibration needed | Relocate thermostat away from heat sources, recalibrate temperature sensor |
| App not connecting | Internet issues, account problems, app error | Check internet connection, verify login credentials, update app |
| Short cycling | Wiring issues, system configuration | Check wiring, adjust cycle rate settings, consult HVAC technician |
Error Codes
- E1: Temperature sensor failure - Check sensor connection
- E2: Communication error - Restart thermostat
- E3: Power issue - Check C-wire connection
- E4: System compatibility - Verify HVAC system compatibility
- E5: Wi-Fi module error - Reset network settings
- E6: Memory error - Factory reset thermostat
Manual Downloads
Current Model Manuals
PREMTB10U
Smart Wi-Fi Thermostat
PREMTB15U
Advanced Smart Thermostat
PREMTB20U
Pro Series Thermostat
PREMTB05U
Basic Smart Thermostat
Popular Previous Models
PREMTB08U
Wi-Fi Enabled Thermostat
PREMTB12U
Touch Screen Thermostat
PREMTB06U
Programmable Thermostat
PREMTB04U
Basic Digital Thermostat