19 69-1532
STEP 12. SET THE FAN AND SYSTEM SWITCHESIF YOU HAVE A PROBLEM
First set the fan switch. Fan On: The fan runs continuously. Use for improved air
circulation or for more efficient central air cleaning. (In a
heat-only system, fan runs continuously only if fan relay is
connected to the G thermostat terminal).
Fan Auto: Normal setting for most homes. The equipment
controls the fan operation.
Then set the system
switch.
Heat: The thermostat controls your heating system.
Off: Both the heating and air conditioning systems are off.
Cool: The thermostat controls your air conditioning system.
Table 4. Solution Guide.
If... Then…
Display does not appear. •Make sure the batteries are installed correctly.
•Make sure the thermostat is mounted and latched on the wallplate.
Mount and latch the thermostat on the wallplate if it is not.
Temperature settings will not change
(example; cannot set the heating higher
or the cooling lower).
•Make sure the temperature setpoints are:
40 to 90°F (4.5 to 32°C) for heating.
45 to 99°F (7 to 37°C) for cooling .
•Check Customize Your Thermostat section feature numbers 34 and 35.
Reset as necessary.
F
an
On Au
to
F
an
On Aut
o
S
ystem
Heat Off Co
ol
S
ystem
Heat Off Coo
l
S
ystem
Heat Off Co
ol