Honeywell 7-Day Programmable Thermostat (RTH7600D) Owner's Manual

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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 http://yourhome.honeywell.com or 
call Honeywell Customer Care toll-free at 1-800-468-1502.