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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
temperature 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

be intermittent.

down when a lock-out condition occurs. If the
heat works intermittently contact the furnace
manufacturer or local service person for
assistance.

www.white-rodgers.com

PROGRAMMING YOUR THERMOSTAT

CONTINUED FROM FIFTH PAGE

6

6. Repeat steps 4 and 5 to select the start time and heating

temperature for the 2nd heating program period.

7. Repeat steps 4 through 6 for the 3rd and 4th heating program

periods. Weekday heating programs are now complete.

8. Press PRGM once. “SA SU” (indicating weekend program) will

appear in the display, along with the start time for the 1st
heating period and the currently programmed temperature.

9. Repeat steps 4 through 8 to complete weekend heating

programming.

10. When you have completed entering your heating program,

press RUN.

Enter Cooling Program

If the outside temperature is below 50

°

F, disconnect

power to the cooling system before programming. Ener-
gizing the air conditioner compressor during cold
weather may cause personal injury or property damage.

1. Move SYSTEM switch to COOL position.

2. Follow the procedure for entering your heating program, using

your selected cooling times and temperatures.

Check Your Programming

Follow these steps to check your thermostat programming one
final time before beginning thermostat operation.
1. Move SYSTEM switch to HEAT position.

2. Press PRGM to view the 1st weekday heating period time and

temperature. Each time you press PRGM, the next heating
period time and temperature will be displayed in sequence for
weekday, then weekend program periods (you may change
any time or temperature during this procedure).

3. Press RUN.

4. Move SYSTEM switch to COOL position.

5. Repeat step 2 to check cooling temperatures.

6. Press RUN to begin program operation.

YOUR THERMOSTAT IS NOW COMPLETELY PROGRAMMED
AND READY TO AUTOMATICALLY PROVIDE MAXIMUM
COMFORT AND EFFICIENCY!

ELECTRICAL DATA
Electrical Rating:

MV to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.0 Amps (Load per terminal)
1.5 Amps Maximum Total Load (All terminals combined)

SPECIFICATIONS

7

THERMAL DATA
Setpoint Temperature Range:

45

°

F to 90

°

F (7

°

C to 32

°

C)

Operating Ambient Temperature Range:

32

°

F to 105

°

F

Operating Humidity Range:

0 to 90% RH (non-condensing)

Shipping Temperature Range:

-40

°

F to 150

°

F

TROUBLESHOOTING

8

Reset Operation
If a voltage spike or static discharge blanks out the display or
causes erratic thermostat operation you can reset the thermostat
by pressing 

 , 

 and TIME at the same time. This also

resets the factory defaults. If the thermostat has power, has been

reset and still does not function correctly contact your heating/
cooling service person or place of purchase.

Batteries
For optimum performance, we recommend replacing batteries
once a year with fresh “AAA” Energizer

®

 alkaline batteries.

Summary of Contents for 1.00E+78

Page 1: ...ctrical shock and or equipment damage disconnect electrical power to the system at the main fuse or circuit breaker until installation is complete CAUTION PART NO 37 6542B Replaces 37 6542A 0434 Failu...

Page 2: ...the thermostat to control the fan contact a qualified heating and air conditioning service person Hydronic Hot Water or Steam Heating Systems This thermostat is set to operate properly with a forced a...

Page 3: ...lve is energized when the system switch is in the HEAT position Fan Relay NOTE To prevent static discharge problems touch side of ther mostat to release static build up before touching any keys If at...

Page 4: ...the room tempera tureattheselectedtemperatureuntilthenextprogramperiod begins Then the thermostat will automatically revert to the program HOLD TEMPERATURE The thermostat can hold any temperature wit...

Page 5: ...WE TH FR indicating weekday program will appear in the display Also displayed are the currently programmed start time for the 1st heating period and the currently programmed temperature flashing EXAMP...

Page 6: ...ditioner compressor during cold weather may cause personal injury or property damage 1 Move SYSTEM switch to COOL position 2 Follow the procedure for entering your heating program using your selected...

Page 7: ...e the thermostat Furnace Cycles Too Fast or Too Slow 1 The location of the thermostat and or the Digital thermostats normally provide precise narrow or wide temperature swing size of the Heating Syste...

Page 8: ......

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