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Troubleshooting - Honeywell pro Series Professional Install Manual

Smart thermostat
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Troubleshooting

Screen is blank
Screen is difficult to
read
Heating or cooling
system does not
respond
Temperature
settings do not
change
"Cool On" or "Heat
On" is flashing
Aux heat runs in
cooling
Cool runs with a call
for heat
Heat runs with cooling • Verify there is not a wire attached to W for heat pump
Sensor will not
connect
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating and cooling system is
on.
• Make sure furnace door is closed securely.
• Check setting in MENU/ Preferences / Inactive backlight
brightness or Inactive sleep backlight brightness
• Touch MENU to go to system mode. Set to heat. Make sure
the heat setpoint is above the room temperature.
• Touch MENU to go to system mode. Set to cool. Make sure
the cool setpoint is below the room temperature.
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
Make sure heating and cooling temperatures are set to
acceptable ranges:
• Heat: 40 °F to 90 °F (4.5 °C to 32.0 °C)
• Cool: 50 °F to 99 °F (10.0 °C to 37.0 °C)
• Compressor protection feature is engaged. Wait 5 minutes
for the system to restart safely, without damage to the
compressor.
• For heat pump systems, verify there is not a wire attached
to W on UWP systems. See "Heat pumps systems" on page
7.
• For heat pump systems, verify there is not a wire attached
to W on UWP systems. See "Heat pumps systems" on page
7.
systems. See "Wiring" on pages 6-7.
• Press and hold Connect on the wireless sensor for 15
seconds. The LED will turn Amber. Return to the thermostat
menu and press Menu > Devices and Sensors. Follow the
on-screen instructions to add the sensor.
13

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