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Troubleshooting Tips (Continued)
If . . . Then . . .
Wait" is displayed
on the screen.
Compressor minimum−off timer is activated.
Wait up to five minutes for the compressor
to turn on.
Fan does not turn on
in a call for heat
(electric furnaces
only)
Check Installer Set−Up 0180: Fan Control in
Heating*. Make sure Electric Heat option is
selected.
Both heating and
cooling systems are
operating at the
same time.
Check Installer Set−Up Number 170: Heating
and/or Cooling Type*. Make sure the setting
matches the installed heating and/or cooling
system.
Check to ensure that bare portions of wires
are not touching.
Heating is running in
Cool mode.
Check Installer Set−Up Number 170: Heating
and/or Cooling Type*. Make sure the setting
matches the installed heating and/or cooling
system.
Heating system
does not turn off and
the heat tempera-
ture setting is set
below the room tem-
perature ("Heat On"
is not shown in dis-
play.)
Check Installer Set−Up Number 170: Heating
and/or Cooling Type*. Make sure the setting
matches the installed heating and/or cooling
system.
Red LED is lit in the
upper right corner of
the thermostat when
the system monitor
detects a possible
problem.
A system monitor is wired to the thermostat
L terminal. Refer to suggestions given in
Heating or Cooling System Does Not Turn
On sections in this table.
*Refer to Installation Instructions for access to Installer Set−Up pro-
cedures.