ecobee3 Lite Smart Thermostat Instruction Manual

Product Overview

The ecobee3 Lite Smart Thermostat offers a sleek design, enhanced comfort, and significant energy savings. It is a programmable Wi-Fi thermostat compatible with various smart home systems, allowing remote control and intelligent temperature management.

Front view of the ecobee3 Lite Smart Thermostat, displaying temperature and humidity.

This thermostat is designed to help you save up to 23% annually on heating and cooling costs by intelligently managing your home's climate. It integrates seamlessly with popular voice assistants like Siri, Alexa, and Google Assistant, and can be controlled from anywhere using the ecobee app on your mobile device.

What's Included

The ecobee3 Lite Smart Thermostat package includes everything necessary for a DIY installation:

• ecobee3 lite thermostat
• Power Extender Kit (for C-Wire-less homes)
• Hardware pack (screws, anchors)
• Instructions and wire labels
• Mounting plate
• Trim plate

Contents of the ecobee3 Lite Smart Thermostat package, including the thermostat, Power Extender Kit, and installation materials.

Setup and Installation

The ecobee3 Lite is designed for easy DIY installation. Before beginning, ensure your HVAC system is compatible. The thermostat is compatible with most 24VAC HVAC systems, including furnaces, ACs (2H/2C), heat pumps (2H/2C + 2 stage AUX), boilers, PTACs, and fan coil units (3 fan speeds).

Compatibility Check

Refer to the compatibility chart below to determine if your existing wiring is suitable. A Power Extender Kit (PEK) is included for homes without a C-wire.

Detailed compatibility chart for ecobee3 Lite Smart Thermostat, showing supported systems and wiring requirements.

Installation Steps (General Overview)

1. Turn off Power: Before touching any wires, turn off power to your heating and cooling system at the breaker box.
2. Remove Old Thermostat: Carefully remove your old thermostat from the wall. Take a picture of the wiring for reference.
3. Label Wires: Use the provided wire labels to mark each wire connected to your old thermostat.
4. Install Mounting Plate: Mount the ecobee backplate to the wall using the included hardware. Ensure it is level.
5. Connect Wires: Connect the labeled wires to the corresponding terminals on the ecobee backplate. If you don't have a C-wire, install the Power Extender Kit according to its instructions.
6. Attach Thermostat: Snap the ecobee3 Lite thermostat onto the mounted backplate.
7. Restore Power: Turn the power back on at the breaker box.
8. Initial Setup: Follow the on-screen instructions on the thermostat to complete the setup, including Wi-Fi connection and system configuration.

A person performing a DIY installation of the ecobee3 Lite Smart Thermostat, connecting wires to the backplate.

Operating Instructions

The ecobee3 Lite Smart Thermostat features a user-friendly touchscreen interface and can be controlled remotely via the ecobee app.

On-Device Control

The thermostat's touchscreen allows direct control over temperature, modes, and settings. You can adjust the target temperature by sliding your finger up or down on the main screen. Access additional options by tapping the icons at the top of the screen.

• Temperature Adjustment: Tap the main temperature display and slide to set your desired temperature.
• System Modes: Tap the mode icon (e.g., snowflake for cool, flame for heat) to switch between Heat, Cool, Auto, or Off modes.
• Weather Information: Tap the weather icon to view local weather forecasts and humidity levels.
• Main Menu: Tap the menu icon (three horizontal lines) to access advanced settings, schedules, sensors, and more.

Remote Control via ecobee App

Manage your comfort from anywhere using the ecobee app on your iOS or Android mobile device. The app provides full control over your thermostat's settings, schedules, and allows you to monitor energy usage.

• Download App: Download the ecobee app from the Apple App Store or Google Play Store.
• Connect Thermostat: Follow the in-app instructions to link your thermostat to your account.
• Smart Home Integration: The ecobee3 Lite integrates with Siri, Amazon Alexa, and Google Assistant for voice control. It also works with SmartThings.

Remote control of the ecobee3 Lite Smart Thermostat demonstrated on a smartwatch, showing various smart home app icons.

Logos indicating compatibility with Apple HomeKit, Amazon Alexa, Google Assistant, and SmartThings.

Smart Features

• Energy Savings: Save up to 23% annually on heating and cooling costs (compared to a hold of 72°F).
• SmartSensor Compatibility: Add SmartSensor (sold separately) to manage hot or cold spots and deliver enhanced comfort to the rooms that matter most.
• Open Door/Window Detection: Automatically pauses heating or cooling when a door or window is left open (requires ecobee SmartSensor for doors and windows and a Smart Security subscription).
• ENERGY STAR Certified: ecobee is an ENERGY STAR Partner of the Year award winner, ensuring high standards of energy conservation.

The ecobee3 Lite Smart Thermostat displayed on a wall, highlighting its energy-saving capabilities.

The ecobee3 Lite Smart Thermostat next to an ENERGY STAR Partner of the Year award logo, signifying its energy efficiency.

The ecobee3 Lite Smart Thermostat shown with an optional SmartSensor on a wooden shelf, illustrating its ability to manage hot or cold spots.

Maintenance

The ecobee3 Lite Smart Thermostat requires minimal maintenance. Keep the screen clean by gently wiping it with a soft, dry cloth. Avoid using abrasive cleaners or solvents.

Ensure the thermostat's sensors (located on the device) are not obstructed to maintain accurate temperature and occupancy readings.

Troubleshooting

If you encounter issues with your ecobee3 Lite Smart Thermostat, consider the following common solutions:

• No Power/Screen Off: Check your circuit breaker to ensure power to your HVAC system is on. Verify all wires are securely connected to the thermostat and Power Extender Kit (if used).
• Incorrect Temperature Readings: Ensure the thermostat and any connected SmartSensors are not exposed to direct sunlight, drafts, or heat sources. Check for obstructions around the sensors.
• Wi-Fi Connectivity Issues: Restart your Wi-Fi router. Ensure your thermostat is within range of your Wi-Fi network. Re-enter your Wi-Fi credentials on the thermostat or through the app.
• System Not Heating/Cooling: Verify the system mode (Heat/Cool/Auto) is correctly set. Check for any active holds or schedules that might be overriding your desired temperature. Ensure your HVAC system itself is functioning correctly.
• App Control Issues: Ensure your ecobee app is updated to the latest version. Check your phone's internet connection.

For more detailed troubleshooting or persistent issues, refer to the official ecobee support resources or contact customer support.

Specifications

Warranty and Support

Warranty Information

The ecobee3 Lite Smart Thermostat comes with a 3-year limited warranty. Please retain your proof of purchase for warranty claims.

For full warranty details, refer to the official warranty document provided with your product or visit the ecobee support website.

Customer Support

For technical assistance, installation guidance, or any other inquiries, please visit the official ecobee support website or contact their customer service team.

Official User Manual (PDF): Download PDF

Official Warranty (PDF): Download PDF