thermostat will quit calling for heat for one minute (this allows some furnaces to reset) and call for heat again. It will repeat this sequence three times. If the temperature still does not rise, it will continue to call for heat. This normally indicates the heating system is not working correctly. You may wish to consult your furnace manufacturer or service person.
The display will indicate CHECK STAT if one of the following occurs.
•One of the keys is stuck down or in.
Check the keys, make sure nothing is pushing them in.
•The thermostat sensor is not functioning. If using a remote
sensor, check connections, wiring and power. Refer to remote sensor installation instructions
After checking the above, press PROGRAM RUN to reset the display. If this does not clear the display, disconnect power for five minutes.
If these checks fail to solve the problem, the thermostat should be replaced.
Temporary Program Override.
Any time your program is running and you would like to override it for a specific amount of time, press 
or 
until the tempera- ture you want is displayed. The display will indicate HOLD, and the number of hours remaining in the hold period will be indicated with
35
the word HRS. To adjust the length of time for the override, press TIME FWD or TIME BACK . HOLD TILL will be displayed as well as the HOLD period expiration time. Press the TIME FWD or TIME BACK keys until you reach the time you would like it to resume the program. The TIME FWD or TIME BACK keys adjust the time in 15 minute increments. This programmed hold time has a 19 hour maximum. Beyond 19 hours you may wish to use the vacation hold feature (page 36). If you need to, you can adjust the temperature up or down.
Indefinite Program Hold.
If you want to operate the thermo- stat to keep a set temperature