| Thermostat does not turn on system | Check Wiring |
| Check fuse. Replace with 3 amp fuse if fuse has opened. |
| Thermostat turns on and off too frequently. | Increase Temperature Differential |
| Display is blank, flashing or constant "LO BAT." | Replace batteries. |
| System fan does not operate properly. | Move fan option switch to either gas or electric, to match system. |
| Time shown on display is not the current time of day. | Change time of day setting. |
| Thermostat does not follow program. | Thermostat in MANUAL mode Thermostat may not have been programmed in HEAT or COOL position. Verify program. |
| Check AM/PM indicators at time of day and programmed time changes Verify program and day of week is correct. |
| Thermostat does not advance day of week | To view or change day of week |
