19
Troubleshooting
If you have difficulty with your thermostat, please try the following
suggestions.
Most problems can be corrected quickly and easily.
Display is blank
•
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 fresh AA alkaline batteries are correctly installed.
Temperature
settings do not
change
Make sure heating and cooling temperatures are set to acceptable
ranges:
•
Heat: 40° to 90 °F (4.5° to 32 °C).
•
Cool: 50° to 99 °F (10° to 37 °C).
Heating or
cooling system
does not
respond
•
Press
SYSTEM
to set system to Heat. Make sure the temperature is
set higher than the Inside temperature.
•
Press
SYSTEM
to set system to Cool. Make sure the temperature is
set lower than the Inside 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.
•
Wait 5 minutes for the system to respond.
Cannot change
system setting
to Cool
•
Check Function 0170: System Type to make sure it is set to match
your heating and cooling equipment.
Fan does not
turn on when
heat is required
•
Check Function 0180: Heating Fan Control to make sure it is set
to match your heating equipment.
Heating system
is running in
cool mode
•
Check Function 0170: System Type to make sure it is set to match
your heating and cooling equipment.
Red light is on
•
If thermostat is in Emergency Heat mode the red light is normal.
It shows that the thermostat is in emergency heat mode.
•
If thermostat is not in Emergency Heat mode, contact a qualified
service contractor for repair.
“Wait” appears
on the screen
•
Compressor protection feature is engaged. Wait 5 minutes for the
system to restart safely, without damage to the compressor.
Heat pump
issues cool air
in heat mode,
or warm air in
cool mode
•
Check Function 0190: Heat Pump Changeover Valve to make
sure it is properly configured for your system.
For assistance with this product, please visit honeywellhome.com or call
Resideo Customer Care toll-free at 1-800-468-1502.
