14
SYMPTOM
POTENTIAL SOLUTION
Thermostat will not
allow me to program
a setpoint
temperature higher
than 90˚ F (32˚ C).
This is above the normal thermostat temperature setting range
of 45˚ to 90˚ F (7˚ to 32˚ C).
Thermostat will not
allow me to program
a setpoint
temperature lower
than 45˚ F (7˚ C).
This is below the normal thermostat temperature setting range
of 45˚ to 90˚ F (7˚ to 32˚ C).
Fan continues to run
all the time whether
the system is on or
off.
Check that the fan control switch is in the
AUTO
position. This
will allow the fan to run only when the heating or cooling system
is turned on and running.
Check thermostat wiring to make sure that the fan control
wiring is connected to the correct terminals on the wiring
terminal block. See
Installation and Wiring Diagrams
sections
of this manual.
Fan continues to run
in cooling mode when
the system has
turned off.
The Residual Cooling Fan Control Feature can allow up to a 90
second fan delay after cooling system shutdown for energy
efficiency gains. The default setting is 60 seconds. This can be
changed to disable this feature or shorten the time period if
desired. See
Setting Residual Cooling Fan Feature
section of
this manual.
The room is too
warm or too cold.
See
Review Set Temperature
section of this manual to verify the
current setpoint and make any modifications that are necessary.
TROUBLESHOOTING
7
cont.
15
WIRING DIAGRAMS
8
Rc Rh
G
Factory Installed
Jumper
Factory Installed
Jumper
Typical 4-Wire Single Transformer Heating and Cooling System
W
Y
B
O
Heat
Control
Fan
Control
Cool
Control
24 Volt AC
Transformer
120
Volt AC
Hot Side
Transformer
Rc Rh
G
Typical 3-Wire Heating System with Fan Control
W
Y
B
O
Heat
Control
Fan
Control
24 Volt AC
Transformer
120
Volt AC
Hot Side
Transformer
Typical 2-Wire 24 Volt AC or 250mV - 750mV Millivolt Heating Systems
Rc Rh
G
W
Y
B
O
Remove
Factory Installed
Jumper
Heat
Control
24 Volt AC
Transformer
or Thermopile
120
Volt AC
Hot Side
Transformer
