System Lockout and Diagnostic Features

SYSTEM LOCKOUT FEATURES

When system lockout occurs, the gas valve is de-energized. The circulator blower may be energized at heat speed for some faults, and if flame is sensed, the inducer blower is energized. The diagnostic indicator light will flash or glow continuously to indicate system status. (System lockout will never override the precautionary features.)

To reset the control after system lockout, do one of the following:

1.Interrupt the call for heat at the thermostat for at least one second, but for less than 20 seconds (if flame is sensed with the gas valve de-energized, interrupting the call for heat at the thermostat will not reset the control).

2.Interrupt the 24 VAC power at the control for at least ten seconds. You may also need to reset the flame rollout sensor switch.

3.After one hour in lockout, the control will automatically reset itself.

DIAGNOSTIC FEATURES

The 50A66-743 control continuously monitors its own operation and the operation of the system. If a failure oc- curs, the DS 1 (red) and DS 2 (green) LEDs will indicate a failure code as shown below.

50A66-743 specifications

The White Rodgers 50A66-743 is a state-of-the-art heating and cooling thermostat designed for maximum comfort and efficiency in residential environments. This versatile device is known for its reliability and user-friendly features, making it a popular choice among homeowners and HVAC professionals alike.

One of the key features of the 50A66-743 thermostat is its programmable functionality. Users can easily set temperature schedules for different times of the day, ensuring optimal energy consumption while maintaining a comfortable home environment. With the option to program up to four different time periods per day, this thermostat allows for customizable comfort tailored to the homeowner's lifestyle.

The 50A66-743 employs advanced technology to facilitate precise temperature control. Its microprocessor-based design ensures accurate readings and smooth operation, allowing the system to maintain the set temperature with minimal fluctuation. This not only enhances comfort but also promotes energy efficiency, which can result in reduced utility bills.

Another notable characteristic of the White Rodgers 50A66-743 is its compatibility with various heating and cooling systems. It can easily integrate with single-stage and multi-stage systems, including gas, oil, and electric furnaces, as well as heat pumps. This versatility makes it an ideal choice for diverse HVAC applications.

User convenience is a top priority with this model, and it is equipped with a clear, easily readable display that provides real-time temperature readings. The backlit screen enhances visibility, making it easy for users to check the status of their heating or cooling systems, even in low-light conditions.

Additionally, the 50A66-743 features a simple interface with intuitive buttons that allow for quick adjustments to temperature settings. This straightforward design minimizes the learning curve for new users, making it accessible for families of all ages.

The thermostat also includes a filter change reminder, which helps homeowners stay on top of maintenance tasks, ensuring optimal system performance. Regular filter changes are crucial for maintaining air quality and efficiency, and this alert serves as a helpful nudge to keep homeowners proactive about their HVAC systems.

In summary, the White Rodgers 50A66-743 thermostat combines advanced technology, user-friendly features, and compatibility with various HVAC systems, making it an excellent choice for those seeking comfort and efficiency in their homes. Its programmable functionality, precise temperature control, and convenient design ensure that users can easily manage their home’s climate while saving on energy costs.