3 lite - Thermostat Ecobee - Free user manual and instructions
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| Product Type | Smart Thermostat |
| Brand | Ecobee |
| Model | 3 Lite |
| Dimensions | 3.92 x 2.75 x 0.98 inches (99.6 x 69.9 x 24.9 mm) |
| Weight | 4.8 oz (136 g) |
| Power Supply | 24VAC from HVAC system (requires C wire or Power Extender Kit) |
| Display | 3.5-inch color LCD touchscreen |
| Connectivity | Wi-Fi 802.11 b/g/n (2.4 GHz), Bluetooth |
| Compatibility | Most 24V HVAC systems (gas, oil, electric, heat pump, dual fuel) |
| Main Functions | Smart scheduling, remote sensor support (up to 32), geofencing, voice control (Alexa, Google Assistant, Apple HomeKit), energy reports, Auto Home/Away |
| Remote Sensors | Compatible with Ecobee SmartSensor (sold separately) |
| Voice Assistant | Built-in Amazon Alexa, works with Google Assistant and Apple HomeKit |
| Operating Temperature | 32°F to 104°F (0°C to 40°C) |
| Humidity Range | 5% to 95% RH (non-condensing) |
| Safety Certifications | CSA, UL, Energy Star |
| Installation | DIY with provided instructions; requires basic HVAC knowledge |
| Cleaning and Maintenance | Wipe gently with a soft, damp cloth; avoid liquids and abrasives |
| Spare Parts | None user-serviceable; contact support for replacement |
| Warranty | 3 years limited |
Frequently Asked Questions - 3 lite Ecobee
Does the Ecobee 3 Lite support remote sensors?
Yes, the Ecobee 3 Lite is compatible with Ecobee's SmartSensor (sold separately) to help eliminate hot and cold spots. It can support up to 32 sensors.
Can I install the Ecobee 3 Lite without a C wire?
The Ecobee 3 Lite requires a C wire (common wire) for power. If your system lacks a C wire, you can use the included Power Extender Kit (PEK) to create a virtual C wire.
Is the Ecobee 3 Lite compatible with my HVAC system?
The Ecobee 3 Lite works with most 24V heating and cooling systems, including gas, oil, electric, heat pump, and dual fuel. Check the compatibility tool on Ecobee's website.
Does the Ecobee 3 Lite have a built-in Alexa?
Yes, the Ecobee 3 Lite includes built-in Amazon Alexa for voice control. It also works with Google Assistant and Apple HomeKit via the Ecobee app.
How do I reset the Ecobee 3 Lite to factory settings?
Go to Main Menu > Settings > Reset > Factory Default. Confirm to erase all settings and data. Alternatively, remove the thermostat from its base and reattach after 10 seconds.
What is the Ecobee 3 Lite's display size?
The Ecobee 3 Lite features a 3.5-inch color LCD touchscreen display for easy interaction.
Can I use the Ecobee 3 Lite with a heat pump?
Yes, the Ecobee 3 Lite supports heat pumps with auxiliary heat. Configure the system type during setup.
How does the Ecobee 3 Lite save energy?
It uses smart scheduling, geofencing, and occupancy detection to automatically adjust temperature when you're away. The Eco+ feature further optimizes savings.
What is the warranty period for the Ecobee 3 Lite?
The Ecobee 3 Lite comes with a 3-year limited warranty covering defects in materials and workmanship.
How do I clean the Ecobee 3 Lite?
Clean the thermostat with a soft, slightly damp cloth. Do not use any liquids, sprays, or abrasive cleaners. Avoid getting moisture into the device.
User questions about 3 lite Ecobee
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USER MANUAL 3 lite Ecobee
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Product information
Brand : Ecobee
Model : 3 lite
Category : Thermostat