!CAUTION

If the outside temperature is below 50°F,

DO NOT use the button to move the temperature below the setpoint tempera- ture. Property damage may result due to compressor slugging.

9.Why doesn’t the temperature change at the time I programmed?

There may be a number of causes for this situation. The following are primary rea- sons.

The EMR function is operating. The EMR function will automatically bring on the system automatically to bring the temperature to the selected level by the beginning of the next program period.

See OPERATING YOUR THERMO- STAT.

You have programmed the incorrect day or time. Check your programming (be sure that the times you programmed are correct AM or PM times). See PRO-

GRAMMING YOUR THERMOSTAT.

The thermostat is in the HOLD mode.

RUN

Press PRGM to start program operation.

See OPERATING YOUR THERMO- STAT.

The compressor lockout feature is oper- ating; wait about 5 minutes for system to begin running. See OPERATING YOUR THERMOSTAT.

10.Why does the blower fan keep running after the system has turned off?

You have programmed the fan to run

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White Rodgers 1F90W-51 manual See Operating Your THERMO- Stat, Gramming Your Thermostat

1F90W-51 specifications

The White Rodgers 1F90W-51 is a sophisticated thermostat designed for modern heating and cooling systems, offering homeowners a blend of convenience, energy efficiency, and advanced technology. This programmable thermostat is well-regarded for its user-friendly features and ease of installation, making it a popular choice among DIY enthusiasts and professionals alike.

One of the standout features of the White Rodgers 1F90W-51 is its ability to provide precise temperature control. It supports a 7-day programming schedule, allowing users to set different temperatures for each day of the week, maximizing comfort while minimizing energy usage. This feature is particularly beneficial for families with varying schedules, enabling them to maintain optimal home temperatures when they are present and reduce heating or cooling when the house is empty.

The 1F90W-51 incorporates advanced technology that allows for compatibility with a wide range of HVAC systems, including conventional heating and cooling setups, heat pumps, and even multi-stage systems. The thermostat's digital display makes it easy for users to read and adjust settings, while its intuitive interface simplifies programming and operation.

In terms of efficiency, the White Rodgers 1F90W-51 is designed to help homeowners save on energy bills. By allowing for precise temperature adjustments and programmable schedules, it encourages users to optimize their heating and cooling usage. This not only protects the environment by reducing energy consumption but also translates to cost savings over time.

Another notable characteristic of the 1F90W-51 is its built-in temperature hold feature, which allows users to override the programmed settings temporarily. This is useful for occasions when unexpected changes in schedule may require a quick adjustment without the need to reprogram the entire unit.

In addition to functionality, the White Rodgers 1F90W-51 boasts a sleek design that blends seamlessly into any home décor. Its compact size and classic appearance allow it to fit well in various locations throughout the house.

Overall, the White Rodgers 1F90W-51 is a reliable and feature-rich thermostat that provides users with the tools needed to enhance their home comfort while remaining conscious of energy consumption. Its combination of programmability, compatibility, and user-friendly design makes it a top choice for those seeking an efficient and effective climate control solution.