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SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION
Heat, Cool or Fan Runs
Constantly
Thermostat Setting and
Thermostat Thermometer
Disagree
Thermostat Does Not Follow
Program
1. Possible short in wiring.
2. Possible short in thermostat.
3. Possible short in heat/cool/fan
system.
4. Fan Switch is set to Fan On.
1. Thermostat thermometer
setting requires adjustment.
1. AM or PM set incorrectly in
program.
2. AM or PM set incorrectly on
the clock.
3. Voltage spike or static
discharge.
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 in previous Corrective
Actions. Also, if the FAN switch is set to the ON
position, the blower fan will cycle continuously
whether the heating or cooling system is running,
move FAN switch to the AUTO position. 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.
The thermometer can be adjusted +/- 5 degrees. See
Temperature Display Adjustment in the Configuration
Menu Section.
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 Operation by pressing
FF
FF
F
ANAN
ANAN
AN,
TIME BTIME B
TIME BTIME B
TIME B
AA
AA
A
CKCK
CKCK
CK, and
the temperature
DODO
DODO
DO
WNWN
WNWN
WN arrow at the same time.