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TROUBLESHOOTING
TROUBLESHOOTINGQUICK REFERENCE TO CONTROLS & DISPLAY
DISPLAY IS BLANK
If Power LED not illuminated at the equipment control
module check the following.
system is on.
POWER/STATUS – On solid during normal operation. Flashes
when connection to the thermostat is lost and at power-up while
the thermostat connection is being established.
HEATING – On when heating outputs are active.
COOLING – On when cooling outputs are active.
FAN – On when fan output is active.
HUMIDIFIER – On when humidifier output is active.
DEHUMIDIFIER – On when dehumidifier output is active.
VENTILATION – On when ventilation output is active.
AIR CLEANING – On when air cleaner output is active.
HEATING SYSTEM DOES NOT RESPOND
(“HEATING” APPEARS ON SCREEN)
side of the transformer between power and
equipment to find the cause of the problem.
the Home Comfort Control is functional. Check the
heating equipment to find the cause of the problem.
Comfort Control and the heating equipment.
COOLING SYSTEM DOES NOT RESPOND
(“COOLING” APPEARS ON SCREEN)
side of the transformer between power and
equipment to find the cause of the problem
the Home Comfort Control is functional. Check the
cooling system to find the cause of the problem.
Comfort Control and the cooling equipment.
FAN DOES NOT TURN ON IN A CALL FOR HEAT
the fan control is properly set to match the type of
system.
HEAT PUMP ISSUES COOL AIR IN HEAT MODE,
OR WARM AIR IN COOL MODE
reversing valve is connected to the proper terminal.
HEAT/COOL BOTH ON AT SAME TIMEEQUIPMENT CONTROL MODULE LEDs
to match the installed heating/cooling equipment.
not shorted together.
HEATING EQUIPMENT IS RUNNING IN
COOL MODE
to match the installed heating/cooling equipment
(see page 11).
“HEATING” IS NOT DISPLAYED
(Control Setup) is set correctly.
the temperature level above the current room
temperature.
“COOLING” IS NOT DISPLAYED
(Control Setup) is set correctly.
the temperature level below the current room
temperature.
ERROR CODES
Error code Message Error Description
01
Open temperature sensor circuit
02 Shorted temperature sensor circuit
03 Error in permanent memory
05 Thermostat lost connection to equipment interface module
HOME COMFORT CONTROL
™
FEATURES
– Humidification automatic or manual control.
– Dehumidification.
™
air cleaning.
– Ventilation with temperature and humidity limits.
™
raises the room temperature 3°F to 5°F.
sensor.
constant backlight option available.
weekday/weekend schedules.
programming (batteries must be installed).
reminders.
schedule at any time.
the start of a program event.
your equipment.
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