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69-2715EF—07 38
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 and cooling system is on.
• Make sure furnace door is closed securely.
• Make sure C wire is connected (see
page 8).
Cannot change
system setting to
Cool
• Check that System Setup screen “Your thermostat controls” or “Your system type” is
set to match your heating and cooling equipment (see page 35).
Fan does not turn
on when heat is
required
• Check that System Setup screen “Your fan control” is set to match your heating
equipment (see page 34).
“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 your setting for System Setup screen “Type of changeover valve” to make sure
it is properly configured for your system (see page 34).
Heating or cooling
system does not
respond
• Touch MODE to set system to Heat. Make sure the temperature is set higher than the
Inside temperature.
• Touch MODE 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 and cooling system is on.
• Make sure furnace door is closed securely.
• If “Wait” is displayed, the compressor protection timer is on. Wait 5 minutes for the
system to restart safely, without damaging the compressor (see page 31).
Heating system
is running in cool
mode
• Check that System Setup screen “Your thermostat controls” or “Your system type”
is set to match your heating and cooling equipment (see “System Setup Options
(SETTINGS > System Setup)” on page 35).
Troubleshooting
33-00593ES_A.indb 3833-00593ES_A.indb 38 9/20/2021 7:09:55 PM9/20/2021 7:09:55 PM
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