Troubleshooting

Display is blank

•Check circuit breaker and reset if necessary.

•Make sure power switch at heating & cooling system is on..

•Make sure furnace door is closed securely.

•If thermostat is battery powered, make sure fresh AA alkaline batteries are correctly installed..

Temperature settings do not change

Make sure heating and cooling temperatures are set to acceptable ranges:

•Heat: 45° to 90°F (7° to 32°C).

•Cool: 50° to 99°F (10° to 37°C).

Heating system does not respond (“HEATING” appears on screen)

•Check for 24 VAC at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the heating equipment to find the cause of the problem.

•Check for 24 VAC between the heat terminal (W) and the transformer common. If 24 VAC is present, the thermostat is functional. Check the heating equipment to find the cause of the problem.

•Check for loose or broken wires between the thermostat and the heating equipment.

Troubleshooting

Cooling system does not respond (“COOLING” appears on screen)

•Check for 24 VAC at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the cooling equipment to find the cause of the problem.

•Check for 24 VAC between the cooling terminal (Y) and the transformer common. If 24 VAC is present, the thermostat is functional. Check the cooling system to find the cause of the problem..

•Check for loose or broken wires between the thermostat and the cooling equipment.

Fan does not turn on in a call for heat

•Check System Setting #02 (Fan Control), to make sure the fan control is properly set to match the type of system (see page 11)..

Heat pump issues cool air in heat mode, or warm air in cool mode

•Check System Setting #12 (Reversing Valve), to make sure it is properly configured for your system (see page 12)..

Heat/cool both on at same time

•Check SW1 (Equipment Type), to make sure it is set to match the installed heating/cooling equipment

(see page 11)..

•Check to make sure heating and cooling wires are not shorted together..

Heating equipment is running in cool mode

•Check SW1 (Equipment Type), to make sure it is set to match the installed heating/cooling equipment

(see page 11)..

“HEATING” is not displayed

•Change the System Mode to Heat, and set the temperature level above the current room temperature..

“COOLING” is not displayed

•Change the System Mode to Cool, and set the temperature level below the current room temperature..

8476 specifications

The Aprilaire 8476 is a smart thermostat designed to enhance home climate control while promoting energy efficiency. This advanced thermostat stands out with its innovative features and user-friendly design, making it a top choice for homeowners looking to optimize their indoor environment.

One of the key features of the Aprilaire 8476 is its built-in Wi-Fi capability, which allows users to easily connect and control their home’s heating and cooling systems remotely via a smartphone or tablet. This connectivity ensures that users can adjust their home’s temperature settings anytime, anywhere, making it ideal for busy lifestyles.

The intuitive touchscreen interface offers easy navigation and clear visibility of current temperature settings and schedules. This modern design enhances user interaction, allowing for straightforward programming of heating and cooling schedules to suit individual preferences.

Energy efficiency is a top priority with the Aprilaire 8476. Its intelligent algorithms are designed to learn user habits over time, optimizing energy usage and reducing utility bills. The thermostat can provide energy reports and insights, helping homeowners make informed decisions about their energy consumption.

The Aprilaire 8476 also features advanced zoning capabilities, which means it can control multiple zones in a home independently. This feature ensures consistent comfort in different areas, allowing for customized climate control when needed.

For homes equipped with humidification systems, the Aprilaire 8476 integrates seamlessly, offering advanced humidity control. This capability helps maintain optimal indoor air quality and comfort levels, preventing issues associated with extreme dryness or humidity.

Compatibility is another strong point for the Aprilaire 8476, as it works with various HVAC systems, including conventional, heat pump, and multi-stage systems. This versatility means that homeowners do not need to worry about system incompatibilities when upgrading their thermostat.

In summary, the Aprilaire 8476 is an industry-leading smart thermostat that combines innovative technology with user-friendly features. Its Wi-Fi connectivity, touchscreen interface, energy efficiency practices, zoning capabilities, humidity control, and broad compatibility make it an excellent choice for homeowners seeking to enhance their comfort while reducing energy costs.