Honeywell Home T9 Guide D'installation page 16

Troubleshooting
If you have difficulty with your thermostat, please try the following suggestions. Most
problems can be corrected quickly and easily.
Display is blank
Heating or
cooling system
does not
respond
Temperature
settings do not
change
Aux heat runs in
cooling
Cool runs with a
call for heat
Sensor will not
connect
CAUTION: ELECTRONIC WASTE NOTICE
The product should not be disposed of with other household waste.
Check for the nearest authorized collection centers or authorized
recyclers. The correct disposal of end-of-life equipment will help
prevent potential negative consequences for the environment and
human health.
• Check circuit breaker and reset if necessary.
• Make sure power switch for heating & cooling system is on.
• Make sure furnace door is closed securely.
• Make sure the C wire is connected.
• Make sure the R/Rc jumper is set correctly. See page 11.
• Press Menu > System Mode > Heat > Done to set the system
to Heat mode. Make sure the desired temperature is higher
than the indoor temperature.
• Press Menu > System Mode > Cool > Done to set the system
to Cool mode. Make sure the desired temperature is lower
than the indoor temperature.
• Check circuit breaker and reset if necessary.
• Make sure power switch for heating & cooling system is on.
• Make sure furnace door is closed securely.
• Wait 5 minutes for the system to respond.
This thermostat has adjustable minimum and maximum limit
settings for heating and cooling. If these settings were not
adjusted when setup was done, heat has a setting range of
40-90°F and cool has a range of 50-99°F.
• For heat pump systems, verify there is not a wire attached to
W on the UWP.
• For heat pump systems, verify there is not a wire attached to
W the UWP.
• 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.
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