White Rodgers 1F87-251 specifications Troubleshooting, Symptom Possible Cause Corrective Action

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TROUBLESHOOTING (cont.)

Symptom

Possible Cause

Corrective Action

No Heat/No Cool/No Fan

1.

Blown fuse or tripped circuit breaker.

Replace fuse or reset breaker.

(common problems)

2.

Furnace power switch to OFF.

Turn switch to ON.

 

3.

Furnace blower compartment door or

Replace door panel in proper position to engage

 

 

panel loose or not properly installed.

safety interlock or door switch.

 

 

 

 

No Heat

1.

Pilot light not lit.

Re-light pilot.

 

2.

SYSTEM Switch not set to HEAT.

Set SYSTEM Switch to HEAT and raise setpoint

 

 

 

above room temperature.

 

3.

Loose connection to thermostat or system.

Verify thermostat and system wires are securely Attached.

 

4.

Furnace Lock-Out Condition. Heat may also

Many furnaces have safety devices that shut the system

 

 

be intermittent.

down when a lock-out condition occurs. If the heat works

 

 

 

intermittently contact the furnace manufacturer or local

 

 

 

service person for assistance.

 

5.

Heating System requires service or

Diagonistic: Set SYSTEM Switch to HEAT and raise the

 

 

thermostat requires replacement.

setpoint above room temperature. Within a few seconds

 

 

 

the thermostat should make a soft click 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 system is

 

 

 

operating correctly.

 

 

 

 

No Cool

1.

SYSTEM Switch not set to COOL.

Set SYSTEM Switch to COOL and lower setpoint below

 

 

 

room temperature.

 

2.

Loose connection to thermostat or system.

Verify thermostat and system wires are securely attached.

 

3.

Cooling System requires service or thermostat

Same procedure as diagnostic for No Heat condition

 

 

requires replacement.

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 if

 

 

 

the compressor lock-out option is selected in the

 

 

 

configuration menu (Item 6).

 

 

 

 

Heat, Cool or Fan Runs Constantly

1.

FAN Switch set to Fan ON.

Check each wire connection to verify they are not

 

2.

Possible short in wiring.

shorted or touching together. No bare wire should

 

3.

Possible short in thermostat.

stick out from under terminal screws.

 

4.

Possible short in Heat/Cool/Fan system.

Try resetting the thermostat. 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.

 

 

 

 

Furnace Cycles Too Fast or Too Slow

1.

The location of the thermostat and/or the size

Item 2 in the Configuration Menu is the adjustment

(narrow or wide temperature swing)

 

of the Heating System can influence the cycle rate.

that controls the cycle rate. If an acceptable cycle

 

 

 

rate is not achieved using the FA (Fast) or SL

 

 

 

(Slow) adjustment contact a local service person for

 

 

 

additional suggestions.

 

 

 

 

Cooling Cycles Too Fast or Too Slow

1.

The location of the thermostat and/or the size of the

The cycle rate for cooling is fixed and can not be adjusted.

(narrow or wide temperature swing)

 

Cooling System may be influencing thecycle rate.

Contact a local service person for suggestions.

 

 

 

 

Thermostat Setting and Thermometer

1.

Thermostat thermometer setting requires

The thermometer can be adjusted +/- 4 degrees as listed

Disagree

 

adjustment.

in item 7 of the Configuration Menu. No other adjustment

 

 

 

is possible.

 

 

 

 

Clock Loses or Gains Time

1.

Loss of power to thermostat and low batteries.

The thermostat will maintain its program in memory even

 

 

 

with no power/no batteries but the clock time will be

 

 

 

incorrect when power is restored. See No Heat/No Cool/

 

 

 

No Fan (common problems) above for items to check in

 

 

 

the system.

 

 

 

 

Heat or Cool Starts Early

1.

EMR activated

See Configuration Menu (Item 4).

 

 

 

 

Thermostat Does Not Follow Program

1.

AM or PM set incorrectly in program.

Check current clock and program settings including

 

2.

AM or PM set incorrectly on the clock.

the AM or PM designations for each time period.

 

3.

Voltage spike or static discharge.

If a voltage spike or static discharge occurs use the

 

 

 

Reset Operation listed above.

 

 

 

 

Blank Display and/or Keypad Not

1.

Loss of power and dead batteries.

Replace batteries and check heat/cool system for

Responding

2.

Voltage Spike or Static Discharge.

proper operation. If a voltage spike or static discharge

 

 

 

occurs use the Reset Operation listed above.

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Contents Precautions SpecificationsOperator Save these instructions for future use DescriptionInstallation Remove OLD ThermostatAttach Thermostat Base to Wall Check Thermostat OperationHeating System Cooling SystemConfiguration Menu Thermostat Buttons and SwitchesOperation DisplayOperating Features Configuration MenuProgramming Your Thermostat Planning Your ProgramSet Current Time and Day Enter Heating ProgramTroubleshooting Reset OperationCheck Your Programming Enter Cooling ProgramTroubleshooting Symptom Possible Cause Corrective Action

1F87-251 specifications

The White Rodgers 1F87-251 is an advanced digital thermostat designed to provide homeowners with efficient climate control and energy savings. This versatile thermostat combines user-friendly features with cutting-edge technology to meet the demands of modern heating and cooling systems.

One of the main features of the 1F87-251 is its programmable functionality, allowing users to set customized heating and cooling schedules. This program capability enables users to adjust temperatures according to their daily routines, enhancing comfort while minimizing energy consumption. With up to four program periods per day, homeowners can easily create a schedule that reflects their lifestyle, ensuring the system operates efficiently when needed.

The thermostat boasts a user-friendly backlit display that shows the current temperature, set temperature, and system status at a glance. The intuitive interface makes programming and adjustments simple, even for those who may not be technologically savvy. Additionally, the large buttons and clear display improve accessibility, making it suitable for users of all ages.

Importantly, the White Rodgers 1F87-251 incorporates Smart Recovery technology, which allows the thermostat to calculate the optimal time to begin heating or cooling a space to reach the desired temperature by a specified time. This feature not only enhances comfort but also contributes to energy efficiency.

The 1F87-251 is compatible with a wide range of heating and cooling systems, including gas, oil, and electric systems, as well as heat pumps. This compatibility ensures that it can be seamlessly integrated into most residential HVAC setups. Moreover, the thermostat includes a staging feature, allowing for multi-stage heating or cooling, which helps provide a more consistent temperature control.

Another important aspect of the White Rodgers 1F87-251 is its energy-saving mode. By employing energy-saving features, such as setting higher temperatures during the summer and lower during the winter when the home is unoccupied, homeowners can significantly reduce their energy bills.

The thermostat's battery backup ensures that settings are retained even in the event of a power outage, providing peace of mind. Overall, the White Rodgers 1F87-251 is a highly functional and efficient thermostat that combines modern technology with ease of use, making it an excellent choice for those looking to enhance their home comfort while reducing energy usage.
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