White Rodgers 1F87-361 Installation And Operation Instructions Manual page 8

TROUBLESHOOTING
Symptom
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
of Emerson Electric Co.
Possible Cause
1. SYSTEM Switch not set to
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.
HOMEOWNER HELP LINE: 1-800-284-2925
www.white-rodgers.com
Corrective Action
COOL below Set SYSTEM Switch to COOL and lower setpoint
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. 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.