Troubleshooting and Support

Make sure fresh AA alkaline batteries are correctly installed.

• When running heat, display will show HEAT ON in lower right of display.

• When running cool, display will show COOL ON in lower right of display.

• If display shows WAITING FOR EQUIPMENT under temperature reading, it is in compressor delay mode to protect the system. Wait 5 minutes to see if the thermostat makes a Heat or Cool call.

• If display does not indicate a call for Heat or Cool or WAITING FOR EQUIPMENT, verify the mode setting, temperature setpoint and room temperature.

If the Up or Down arrow is pressed:

• Upper left of display shows mode setting.

• Upper right shows setpoint.

• Center of display shows room temperature

If the issue persists:

• Check circuit breaker and reset if necessary.

• Make sure power switch at heating & cooling system is on.

• Make sure furnace door is closed securely.

• Verify that no wire is attached to W for heat pump systems. See the Wiring section.

• For heat pump applications the reversing valve is energized in Heat on some heat pumps and Cool for other heat pumps.
  

• Verify that ISU 2060 is set correctly.

• Verify that no wires are shorted. Look for exposed sections of wire at the UWP.

• Verify display does not indicate HEAT ON, COOL ON or AUX HEAT ON.

• Verify that no wire is attached to W for heat pump systems. See the Wiring section.

• Verify that no wires are shorted. Look for exposed sections of wire at the UWP.

• Verify the mode setting (Heat, Cool, Auto, or Em Heat in the upper left of the display).

The setting ranges for these modes are:

• Heat or Em Heat: 32 ºF to 90 ºF (0 ºC to 32.0 ºC).

• Cool: 50 ºF to 99 ºF (10.0 ºC to 37.0 ºC). If the setpoint can be adjusted, but not to the full range shown above, the thermostat may be configured for a maximum heat or minimum cool setpoint to restrict settings that are energy inefficient.