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IF YOU HAVE A PROBLEM
Table 3. Solution Guide.
If... Then…
Display does not appear. Make sure the batteries are fresh and installed correctly.
Make sure the thermostat is mounted and latched on the wallplate.
Mount and latch the thermostat on the wallplate if it is not.
Temperature settings will not change
(example; cannot set the heating higher
or the cooling lower).
Make sure the temperature setpoints are:
40°F to 90°F (4.5°C to 32°C) for heating.
45°F to 99°F (7°C to 37°C) for cooling.
Check Customize Your Thermostat section, Feature Numbers 34 and
35. Reset as necessary.
Heating does not come on. Set the system switch to Heat.
Make sure heating setpoint is above room temperature.
Make sure circuit breaker is not tripped, and reset it if necessary.
Make sure power switch at equipment is in On position.
Wait five minutes for the system to respond.
Cooling does not come on. Set the system switch to Cool.
Make sure the cooling setpoint is below the room temperature.
Make sure the circuit breaker is not tripped, and reset it if necessary.
Make sure System switch at air conditioner is in On position.
Wait five minutes for the system to respond.
System on indicator( = heat, =
cool) is lit, but no warm or cool air is
coming from the registers.
Wait five minutes after seeing flame or snowflake and check registers
again. If no hot or cool air is coming from registers, refer to Heating does
not come on or Cooling does not come on. Or contact your local heating
and cooling contractor.
Display flashes during programming. The temperature setting limit was reached. Heating setting range is 40°F to
90°F (4.5°C to 32°C). Cooling setting range is 45°F to 99°F (7°C to 37°C).
20


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