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RTH6300B Programmable Thermostat
17
Operating Manual
16
In case of difficulty
If you have difficulty with your thermostat, please try the suggestions below. Most
problems can be corrected quickly and easily.
Display is blank Make sure fresh AA alkaline batteries are correctly installed
(see page 15).
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
SSYYSSTTEEMM
button to set system to Heat. Make sure the temperature
is set higher than the Inside temperature.
Press
SSYYSSTTEEMM
button 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.
In case of difficulty
“Cool On” or
“Heat On” is
flashing
Compressor protection feature is engaged. Wait 5 minutes for the system
to restart safely, without damage to the compressor (see page 14).
Other problems If the above measures do not resolve the problem, check the In Case of
Difficulty section in your thermostat Installation Guide.
To restore
Energy Star
®
default settings
Follow these steps to restore Energy Star default settings (see page 10):
1 Press
SSEETT CCLLOOCCKK
//
DDAAYY
//
SSCCHHEEDDUULLEE
.
2 Press
SSEETT SSCCHHEEDDUULLEE
.
3 Press
DDOONNEE
and
NNEEXXTT
at the same time for 4 seconds.
19


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