Introduction
The AprilAire 8920W Wi-Fi Programmable Color Touchscreen Thermostat is designed to monitor and control your home's Indoor Air Quality (IAQ). This thermostat offers features such as automatic humidifier and dehumidifier control, automatic air cleaning with an AprilAire air purifier, and precise temperature control. It ensures a clean, fresh, and comfortable indoor environment and integrates with your installed AprilAire whole-house IAQ products. The Wi-Fi capability allows for remote control via the AprilAire Wi-Fi Thermostat App on your smartphone or tablet. This manual provides essential information for the setup, operation, and maintenance of your thermostat.
Key Features
- Genuine AprilAire programmable Wi-Fi thermostat.
- Remote monitoring and control via the AprilAire Wi-Fi thermostat app on iOS and Android devices.
- Programmable full-color touchscreen display.
- Comprehensive home comfort control: temperature, humidity, air cleaning, and fresh air ventilation.
- Consists of a user interface and a separate equipment control module, requiring only 3 wires for connection between them.
Included Components
Verify that all components are present before beginning installation.
- 8920W Thermostat (User Interface)
- Equipment Control Module (ECM)
- 8052 Outdoor Temperature Sensor
- Safety & Installation Instructions
- Quick Start Guide
- (2) Screws
- (2) Wall Anchors

Figure 1: All components included in the AprilAire 8920W package.

Figure 2: The 8920W Thermostat (display unit) and its separate Equipment Control Module.
Setup & Installation
Installation of the AprilAire 8920W thermostat involves mounting the user interface and the Equipment Control Module (ECM), and connecting them to your HVAC system. The thermostat and ECM communicate using a 3-wire connection, simplifying wiring compared to traditional thermostats. Detailed wiring diagrams and step-by-step instructions are provided in the included Safety & Installation Instructions manual. It is recommended that installation be performed by a qualified HVAC professional.

Figure 3: The 3-wire design simplifies installation between the thermostat and the Equipment Control Module.
Operation
The 8920W features a full-color touchscreen for intuitive control of your home's climate and indoor air quality. You can adjust temperature setpoints, fan modes, and access advanced IAQ settings directly from the display or remotely via the AprilAire app.
Programming Features
The thermostat allows for custom scheduling to optimize comfort and energy savings. Key programming features include:
- Copy function for faster schedule setup across multiple days.
- Automatic adjustment for daylight saving time.
- Programming and custom schedules are retained during a power outage.

Figure 4: The programming screen on the AprilAire 8920W thermostat, illustrating schedule setup.
Heat Blast™ Function
The Heat Blast function provides a quick way to raise the room temperature by 3°F to 5°F with a single touch, ideal for rapid comfort adjustments.

Figure 5: The Heat Blast feature for quick temperature adjustments.
Wi-Fi Connectivity & App Control
The AprilAire 8920W thermostat connects to your home Wi-Fi network, enabling remote control and monitoring through the AprilAire Wi-Fi Thermostat App. It is also compatible with Amazon Alexa and Google Assistant for voice control.

Figure 6: Compatibility with Amazon Alexa and Google Assistant for smart home integration.
Video 1: An overview of the AprilAire 8920W Wi-Fi Smart IAQ Thermostat's features and functionalities.
Indoor Air Quality (IAQ) Control
The 8920W thermostat provides comprehensive control over various aspects of your home's indoor air quality:
- Humidity Control: Automatically manages whole-house humidifiers and dehumidifiers to maintain optimal humidity levels.
- Air Cleaning: Integrates with AprilAire air purifiers for automatic air cleaning cycles.
- Fresh Air Ventilation: Controls fresh air intake systems to ensure proper ventilation and air exchange.

Figure 7: Indoor Air Quality control options displayed on the thermostat screen.
Maintenance
The AprilAire 8920W thermostat requires minimal maintenance. Regularly clean the touchscreen with a soft, dry cloth. Ensure that any connected AprilAire IAQ products, such as humidifiers or air purifiers, are maintained according to their respective manuals to ensure optimal system performance. The thermostat may display filter change reminders or other maintenance alerts.
Troubleshooting
If you encounter issues with your AprilAire 8920W thermostat, consider the following:
- No Power/Blank Screen: Check the circuit breaker for your HVAC system. Ensure all wiring connections are secure (refer to installation manual).
- Wi-Fi Connection Issues: Verify your home Wi-Fi network is operational. Try restarting your router and the thermostat. Ensure the Equipment Control Module (ECM) is within range of your Wi-Fi signal, as it contains the Wi-Fi antenna. Manual connection via the thermostat's touchscreen may be more reliable than app-based setup initially.
- Incorrect Temperature Readings: Ensure the outdoor temperature sensor (if installed) is properly connected and not obstructed.
- IAQ Control Malfunctions: Check the status of connected AprilAire IAQ products (humidifier, dehumidifier, air purifier). Refer to their individual manuals for specific troubleshooting.
For persistent issues, consult the detailed troubleshooting section in your Safety & Installation Instructions or contact AprilAire customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | Aprilaire |
| Model Name | Programmable Thermostat |
| Model Number | 8920W |
| Product Dimensions | 1"D x 7.1"W x 4.4"H |
| Item Weight | 11.04 ounces |
| Controller Type | Amazon Alexa, Google Assistant |
| Connectivity Technology | Wi-Fi |
| Power Source | AC/DC |
| Voltage | 24 Volts (AC) |
| Display Type | LCD Color Touchscreen |
| Screen Size | 7.01 Inches |
| Control Method | App, Touch |
| Mounting Type | Surface, Wall Mounted |
| Material Type | Plastic, Printed Circuit Board |
| Specific Uses | Air Conditioner, Boiler, Dehumidifier, Furnace, Heat Pump, Humidifier, Ventilation |
Warranty & Support
For information regarding product warranty, please refer to the documentation included with your AprilAire 8920W thermostat, specifically the Safety & Installation Instructions. For technical assistance, troubleshooting, or general inquiries, please contact AprilAire customer support. You can find contact details on the official AprilAire website or within your product documentation.
Visit the AprilAire Store for more products and information.