Carrier Furnace - Manual (Page 55)

A CHECK-UP CHECKLIST
Your furnace represents an important investment in your family’s
comfort and your home’s value. To keep it performing properly
and to prevent future problems, have a trained service specialist
give your furnace a professional check-up annually. The following
checklist can be used as a guideline to proper service:
• Inspect all flue gas passages, burners, heat exchangers, coupling
box(es), and inducer assembly.
• Inspect all combustion-air and vent piping inside structure and
pipe terminations outside the structure,
• Check gas pipes leading to and inside of your furnace for leaks,
• Inspect and clean the blower motor and wheel.
NOTE: The inducer and blower motors are pre-lubricated and
require no additional lubrication. These motors can be identified by
the absence of oil ports on each end of the motor.
• Inspect and change or clean air filter(s) if necessary.
• Inspect all supply- and return-air ducts for obstructions, air
leaks, and insulation. Remedy any problem when necessary,
• Inspect the return-air duct connection(s) at the furnace to ensure
it is physically sound, sealed to the furnace casing, and
terminates outside the space containing the furnace,
• Inspect electrical wiring, connections, and components for loose
connections,
• Perform an operational checkout to determine whether your
furnace is working properly and if it requires adjustments.
• Inspect all condensate drain tubes and condensate trap assembly
for leaks. The condensate removal system should be cleaned
annually by a qualified service agency. Refer to the Service and
Maintenance Instructions Guide for further information,
• Examine the physical support of the furnace. Support should be
sound with no cracks, sagging, gaps, etc, around the base,
• Check furnace for any obvious signs of deterioration.
Ask your servicing dealer for further details about an economical
service contract that covers seasonal inspections.
BEFORE YOU REQUEST A
“SERVICE CALL”
If your furnace is not operating or not performing properly,
you may save the expense of a service call by checking a few
things yourself before calling for service.
This furnace has a light emitting diode (LED) status code display
to aid the installer, service technician, or homeowner while
installing or servicing the unit. The LED code can be seen through
the view port in the blower access panel.
NOTE: Record the LED status code BEEORE removing the
blower access door or turning off f 13-v power to the furnace.
See the information booklet inside the main furnace door for a
service code legend. See Fig. 3f,
Eor insufficient airflow:
• Check for dirty air filter(s).
• Check for blocked return-air or supply-air grilles. Be sure they
are open and unobstructed.
If problem still exists, call your dealer for service.
If furnace fails to operate:
Follow this checklist step by step, advancing to the next stop only
if furnace fails to start.
• Check thermostat for proper temperature. Is thermostat set above
room temperature?
• Is thermostat set to HEAT mode?
• Check fuses and circuit breakers. Is the electrical power supply
switch on?
• Is the manual shut-off valve in the gas supply pipe leading to
the furnace open?
NOTE: Turn off electrical supply before continuing with
checklist,
• Is control switch on gas valve in ON position? (Follow start-up
procedures if you must reset switch to ON position.)
• Check manual reset rollout switch located on the burner box.
See Furnace Components in Fig. 1, If furnace has experienced
high temperature conditions, this switch will shut off the
furnace. Reset it by pushing the button on the switch. If it trips
again, shut down the furnace and call for service. See “Shutting
Down Your Furnace” section in this manual.
• Check for obstructions around the vent termination.
If your furnace still fails to operate, call your service representative.
For your convenience, record the furnace product and serial
numbers on back page. Should you ever require service, you will
have ready access to the information needed by your service
representative.
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