Troubleshooting - Honeywell RTH7400 series Owner's Manual

Troubleshooting

If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is blank
Temperature
settings do not
change
Heating or
cooling system
does not respond
Cannot change
system setting
to Cool
Fan does not
turn on when
heat is required
Heating system
is running in cool
mode
Red light is on
"Wait" appears
on the screen
Heat pump
issues cool air
in heat mode, or
warm air in cool
mode
For assistance with this product, please visit http://yourhome.honeywell.com or
call Honeywell Customer Care toll-free at 1-800-468-1502.
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.
•
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).
•
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.
•
Check Function 0170: System Type to make sure it is set to
•
match your heating and cooling equipment.
Check Function 0180: Heating Fan Control to make sure it is set
•
to match your heating equipment.
Check Function 0170: System Type to make sure it is set to
•
match your heating and cooling equipment.
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.
Compressor protection feature is engaged. Wait 5 minutes for the
•
system to restart safely, without damage to the compressor.
Check Function 0190: Heat Pump Changeover Valve to make
•
sure it is properly configured for your system.
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