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www.white-rodgers.com
www.emersonclimate.com
HOMEOWNER HELP LINE: 1-800-284-2925
Symptom Possible Cause Corrective Action
No Heat (continued)
5. Heating system requires service or ther-
mostat requires replacement.
Diagnostic: Set System Switch to HEAT and raise the
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 is operating correctly.
No Cool
1. System Switch not set to COOL.
2. Loose connection to thermostat or system.
3. Cooling system requires service or
thermostat requires replacement.
Set System Switch 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.
Heat, Cool or Fan Runs Constantly.
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.
Check each wire connection to verify they are not short-
ed 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 manufac-
turer 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 (Air Conditioning) Cycles
Too Fast or Too Slow (narrow or wide
temperature swing)
1. The location of the thermostat and/or the
size of the Heating (Cooling) System may
be influencing the cycle rate.
Digital thermostats normally provide precise temperature
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, clip Jumper W-905 as mentioned in the
instructions for Hydronic Heating Systems. It is not pos-
sible to shorten the cycle time. If an acceptable cycle rate
is not achieved as received or by clipping W-905 contact
a local service person for additional suggestions.
Thermostat Setting and Thermostat
Thermometer Disagree
1. Thermostat thermometer setting requires
adjustment.
Thermostat thermometer can be adjusted +/-3 degrees.
See Temperature Display Adjustment in the Operation
section
Thermostat Does Not Follow Program
1. AM or PM set incorrectly in program.
2. AM or PM set incorrectly on the clock.
3. Voltage spike or static discharge..
Check current clock and program settings including the
AM or PM designations for each time period. If a voltage
spike or a static discharge occurs use the Reset Opera-
tion listed above.
Blank Display and/or Keypad
Not Responding
1. Voltage spike or static discharge, Use the Reset Operation listed above.
White-Rodgers is a division
of Emerson Electric Co.
The Emerson logo is a
trademark and service mark
of Emerson Electric Co.
8
PROGRAMMING YOUR THERMOSTAT
CONTINUED FROM SEVENTH PAGE