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Symptom Possible Cause Corrective Action
Furnace/Air Conditioner Cycles Too Fast or 1. The location of the thermostat and/or the Digital thermostats normally provide precise
Too Slow (narrow or wide temperature swing) size of the Heating/Cooling System may be temperature control and may cycle faster than
influencing the cycle rate. some older mechanical models. A faster cycle
rate means the unit turns on and off more
frequently but runs for a shorter time so there is
no increase in energy use. If you would like to
increase the cycle time, refer to step 3 on the
Configuration Menu
Thermostat Setting and Thermostat 1. Thermostat thermometer setting requires The thermometer can be adjusted +/- 3 degrees.
Thermometer Disagree adjustment. See Temperature Display Adjustment in the
Operation section.
Blank Display and/or Keypad Not 1. Voltage spike or static discharge. Use the Reset Operation listed above.
Responding
Heat Setpoint Will Not Respond 1. The desired setpoint conflicts with the Change system mode to COOL. Raise the Cool
to the Temperature Up Key setpoint of the COOL mode. setpoint. Return to HEAT mode and set desired
temperature.
Cool Setpoint Will Not Respond 1. The desired setpoint conflicts with the Change system mode to HEAT. Lower the Heat
to the Temperature Down Key setpoint of the HEAT mode. setpoint. Return to COOL mode and set desired
temperature.
TROUBLESHOOTING
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