Troubleshooting
MORN
DAY
EVE
NITE
HEAT
HEAT
HEAT
HEAT
COOL
COOL
COOL
COOL
SATURDAY
6
MORN
DAY
EVE
NITE
HEAT
HEAT
HEAT
HEAT
COOL
COOL
COOL
COOL
SUNDAY
7
Symptom
Remedy
No display
Check batteries; display is blank when batteries are not present or are dead
System fan does not come on
properly
Verify wiring is correct, check Gas/Electric switch position
Program schedule activates at the
wrong time
Check time (AM/PM) set on thermostat (see “Setting the Time,” Page 12)
Thermostat turns on and off too
frequently
Adjust temperature differential (see “Setting the Temperature Differential,”
Page 8)
Thermostat does not follow program
Verify it is operating in Program mode; check time (AM/PM); check if in Hold
mode
“PROGram” flashes (in Hold mode)
Press Hold button to remove from Hold mode
Fan runs continuously
Check Fan Auto/On switch
Low battery indicator
Batteries need to be replaced
Problem not listed above
Press reset button once*
* Reset Button Function:
Time, day and program/non-program changed to last saved settings (saved after
program or configuration change), configuration and program unchanged, ASC
timer reset to 0.