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Page 31
Troubleshooting Tips
If... Then...
Cool On" is not
displayed on
the screen.
Set the System setting to Cool and set the
temperature setting below the room tempera-
ture. If Cool On" is shown solidly in the dis-
play, but the cooling system does not turn on,
see Cooling system does not turn on"
suggestions at the top of this page.
Wait" is dis-
played 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 (elec-
tric furnaces
only)
Check Installer Set−Up 0180: Fan Control in
Heating*. Make sure Electric Heat option is
selected.
Both heating
and cooling
systems are op-
erating 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 run-
ning 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.
table continued on next page