Symptom

TROUBLESHOOTING

Possible Cause

Corrective Action

No Heat (continued)

No Cool

Heat, Cool or Fan

Runs Constantly

Furnace

(Air Conditioner)

Cycles Too Fast

or Too Slow (narrow or wide temperature swing)

Thermostat Setting &

Thermostat Thermometer

Disagree

Blank Display and/or Keypad Not Responding

Heat Setpoint will not Respond to the Temperature Up Key

Cool Setpoint will not Respond to the Temperature Down Key

Forgot Keypad

Lockout Code

5.Heating system requires service or thermostat requires replacement. (continued)

1.SYSTEM button not pressed to COOL.

2.Loose connection to thermostat or system.

3.Cooling system requires service or thermostat requires replacement.

1.Possible short in wiring.

2.Possible short in thermostat.

3.Possible short in heat/cool/fan system.

4.FAN Switch set to Fan On.

1.The location of the thermostat and/or the size of the Heating System may be influencing the cycle rate.

1.Thermostat thermometer setting requires adjustment.

1. Voltage spike or static discharge.

1.The desired setpoint conflicts with the setpoint of the COOL mode.

1.The desired setpoint conflicts with the setpoint of the HEAT mode.

sound. This sound usually indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation listed above. If the thermostat does not click after being reset contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the furnace manufacturer or a service person to verify the heating is operating correctly.

Press SYSTEM button to COOL and lower setpoint below room temperature.

Verify thermostat and system wires are securely attached.

Same procedure as diagnostic for No Heat condition except set the thermostat to COOL and lower the setpoint below the room temperature. There may be up to a five minute delay before the thermostat clicks in Cooling.

Check each wire connection to verify they are not shorted or touching together. No bare wire should

stick out from under terminal screws. Try resetting the thermostat as described above. If the condition

persists the manufacturer of your system or service person can instruct you on how to test the Heat/Cool system for correct operation. If the system operates correctly, replace the thermostat.

Digital thermostats normally provide precise tem- perature control and may cycle faster than some older mechanical models. A faster cycle rate means the unit turns on and off more frequently but runs for a shorter time so there is no increase in energy use. If you would like to increase the cycle time, choose SL for slow cycle in the menu, step 4. If an accept- able cycle rate is not achieved as received or by choosing slow cycle, contact a local service person for additional suggestions.

The thermometer can be adjusted +/- 4 degrees.

See Temperature Display Adjustment in the Configu- ration Menu section.

Use the Reset Operation at top of previous page.

Change system mode to COOL. Raise the Cool setpoint. Return to HEAT mode and set desired temperature.

Change system mode to HEAT. Lower the Heat setpoint. Return to COOL mode and set desired temperature.

CAUTION: This resets the thermostat to factory default settings of the configuration menu. After performing this reset, the thermostat will require configuration again. Be sure that you know the required configuration settings before resetting.

With the thermostat in any mode, press Q and (£) at the same time to enter the configuration menu at the point where the lockout code is to be entered. Press

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White Rodgers 1F85-277 installation instructions Symptom
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1F85-277 specifications

The White Rodgers 1F85-277 is an advanced programmable thermostat known for its versatility, energy-efficiency, and user-friendly design. It stands as a reliable choice for homeowners looking to enhance their heating and cooling systems' functionality while minimizing energy consumption.

One of the key features of the 1F85-277 is its 7-day programmable capability, which allows users to set schedules for different days of the week. This flexibility ensures that the home is heated or cooled according to individual preferences, thereby optimizing energy usage and providing comfort when it’s needed the most. The thermostat can program up to four different temperature settings per day, allowing precise control over home climate conditions.

Another notable characteristic of the White Rodgers 1F85-277 is its intuitive LCD display. The backlit screen is easy to read, displaying current temperature settings, scheduled programs, and system alerts clearly. This feature is especially useful during nighttime or low-light conditions. The interface allows for straightforward navigation, making it simple for users to create and modify schedules without the need for complex instructions.

The thermostat also integrates advanced technologies, including Smart Recovery. This technology ensures that the home reaches the desired temperature at the programmed time by anticipating how long it takes to heat or cool. By learning from previous system performance, it improves efficiency while maintaining home comfort.

Additionally, the White Rodgers 1F85-277 is compatible with most heating and cooling systems, including gas, electric, and heat pump systems. It supports both single-stage and multi-stage heating and cooling, providing flexibility and compatibility for various home setups.

A significant advantage is its energy-saving features, which can lead to reduced utility bills. By allowing homeowners to schedule their HVAC systems more efficiently, the 1F85-277 plays a crucial role in energy conservation efforts.

Furthermore, installation is straightforward, as the thermostat is designed with a user-centric approach, allowing most homeowners to install it without professional help.

Overall, the White Rodgers 1F85-277 combines advanced technology with practical features, making it an ideal solution for those seeking to improve home comfort while managing energy costs effectively. Its programmable functionality, user-friendly interface, and compatibility with diverse heating and cooling systems make it a standout product in the thermostat market.
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