11
In case of difficulty
If you have difficulty with your Comfort Control, please try the suggestions below.
Most problems can be corrected quickly and easily.
Display is blank
•
Check circuit breaker and reset if necessary.
•
Make sure power switch at heating & cooling system is on.
•
Make sure furnace door is closed securely.
Temperature
settings do not
change
Make sure heating and cooling temperatures are set to acceptable ranges:
•
Heat: 40° to 90°F (4.5° to 32°C).
•
Cool: 60° to 99°F (16° to 37°C).
Heating system
does not respond
(“Heat On”
appears on
screen)
•
Check for 24 VAC at the equipment on the secondary side of the trans-
former between power and common. If voltage is not present, check the
heating equipment to find the cause of the problem.
•
Check for 24 VAC between the heat terminal (W) and the transformer
common. If 24 VAC is present, the Comfort Control is functional. Check
the heating equipment to find the cause of the problem.
•
Check for loose or broken wires between the Comfort Control and the
heating equipment.
Cooling system
does not respond
(“Cool On”
appears on
screen)
•
Check for 24 VAC at the equipment on the secondary side of the trans-
former between power and common. If voltage is not present, check the
cooling equipment to find the cause of the problem
•
Check for 24 VAC between the cooling terminal (Y) and the transformer
common. If 24 VAC is present, the Comfort Control is functional. Check
the cooling system to find the cause of the problem.
•
Check for loose or broken wires between the Comfort Control and the
cooling equipment.
Fan does not
turn on in a call
for heat
•
Check Installer Setup, Function 3 (Fan Control), to make sure the fan con-
trol is properly set to match the type of system (see page 7).
Heat/cool both on
at same time, or
heat does not
turn off
•
Check Installer Setup, Function 1 (System Type), to make sure it is set to
match the installed heating/cooling equipment (see page 7).
•
Check to make sure heating and cooling wires are not shorted together.
