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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 (see page 5).
Heating
or cooling
system does
not respond
• Set system switch to Heat (see page 1). Make sure
the temperature is set higher than the Inside temperature.
• Set system switch to Cool (see page 1). Make sure
the temperature is set lower than the Inside temperature.
• Wait 5 minutes for the system to respond.
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).
“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 page 5).
“Heat On” is
not displayed
• Set the System switch to Heat, and set the
temperature level above the current room
temperature (see page 1).
“Cool On” is
not displayed
• Set the System switch to Cool, and set the
temperature level below the current room
temperature (see page 1).
7


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