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TROUBLESHOOTING
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 to the configuration menu and program. If
Symptom
No Heat/No Cool/No Fan
(common problems)
No Heat
No Cool
Heat, Cool or Fan Runs Constantly.
Furnace Cycles Too Fast or Too Slow
(narrow or wide temperature swing)
Cooling Cycles Too Fast or Too Slow
(narrow or wide temperature swing)
Thermostat Setting and Thermometer
Disagree
Clock Loses or Gains Time
Heat or Cool Starts Early
Thermostat Does Not Follow
Program
Blank Display and/or Keypad Not
Responding
White-Rodgers is a division
of Emerson Electric Co.
The Emerson logo is a
trademark and service mark
8
of Emerson Electric Co.
Possible Cause
1.
Blown fuse or tripped circuit breaker.
2.
Furnace power switch to OFF.
3.
Furnace blower compartment door or
4.
panel loose or not properly installed.
1.
Pilot light not lit.
2.
System Switch not set to Heat.
3.
Loose connection to thermostat or system.
4.
Furnace Lock-Out Condition. Heat may also
be intermittent.
5.
Heating System requires service or
thermostat requires replacement.
1.
System Switch not set to Cool.
2.
Loose connection to thermostat or system.
3.
Cooling System requires service or
thermostat requires replacement.
1.
Fan Switch set to Fan On.
2.
Possible short in wiring.
3.
Possible short in thermostat.
4.
Possible short in Heat/Cool/Fan system.
1.
The location of the thermostat and/or the size
of the Heating System may be influencing
the cycle rate.
1.
The location of the thermostat and/or the size
of the Cooling System may be influencing the
cycle rate.
1.
Thermostat thermometer setting requires
adjustment.
1.
Loss of power to thermostat and low
batteries.
1.
EMR activated
1.
AM or PM set incorrectly in program.
2.
AM or PM set incorrectly on the clock.
3.
Voltage spike or static discharge.
1.
Loss of power and dead batteries.
2.
Voltage Spike or Static Discharge.
www.white-rodgers.com
www.emersonclimate.com
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 "AA" Energizer
Corrective Action
Replace fuse or reset breaker.
Turn switch to ON.
Replace door panel in proper position to engage
safety interlock or door switch.
Re-light pilot.
Set System Switch to Heat and raise setpoint above room temperature.
Verify thermostat and system wires are securely attached.
Many furnaces have safety devices that shut the system down when
a lock-out condition occurs. If the heat works intermittently contact
the furnace manufacturer or local service person for assistance.
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 system
is operating correctly.
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 if the compressor lock-out option is selected in the
configuration menu (Item 6).
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 below. 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.
Item 2 in the Configuration Menu is the adjustment 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.
The cycle rate for cooling is fixed and can not be adjusted. Contact a
local service person for suggestions.
The thermometer can be adjusted +/- 4 degrees as
listed in item 7 of the Configuration Menu. No other adjustment is
possible.
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.
See Configuration Menu (Item 4).
Check current clock and program settings including the AM or PM
designations for each time period. If a voltage spike or static discharge
occurs use the Reset Operation listed above.
Replace batteries and check heat/cool system for proper operation. If a
voltage spike or static discharge occurs use the Reset Operation listed
above.
®
alkaline batteries.
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