System fan does not work
properly.
1. Check position of fan switch (see Settings section).
2. Check position of Gas / Electric Switch (see Internal
Switch Setting and Mounting the Thermostat to the
Sub-base section).
3. Check wiring (see Wiring Diagram Section).
Thermostat will not follow
program set points.
1. Check to make sure the time of day, the day of week, and the
am/pm indicator are all set and accurately display time
settings (see Setting Time and Day of Week).
2. Check to see if the “System” switch is in the “Off” position,
indicating the system is turned off. If so, move the switch to
“Heat” or “Cool” and allow five minutes for short cycle
protection period to expire.
3. Make sure your set point times are correct. Note: the Heat
and Cool modes have separate set point times and separate
temperature settings (see Programming).
4. Check to see if the program has been overridden. This is
indicated by the program indicator flashing. Press the “Hold”
key twice or wait for the next set point time for the override to
expire.
5. Check to see if the thermostat is in Hold mode, indicated by
the “HOLD” icon in the display. Press either the “Hold” or
the “Return” key to resume the normal program.
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