Carrier 58DP - Page 9

BEFORE YOU REQUEST A
“SERVICE CALL”
BEFORE YOU CALL FOR SERVICE, CHECK FOR
SEVERAL EASILY SOLVED PROBLEMS:
• Check for sufficient airflow. Check the air filter for dirt.
Check for blocked return-air or supply-air grilles. Be sure
they are open and unobstructed. If this isn’t the cause, call
your servicing dealer.
If your furnace isn’t operating at all, check the following list
for easy solutions:
• Is your thermostat set above room temperature? Is the
switch in the HEAT position?
• Is the electrical power supply switch ON? Is the blower
access door firmly in place? Are any fuses blown, or has a
circuit breaker tripped?
• Locate the external manual gas valve in the gas supply
pipe which leads to the furnace. Is this lever parallel with
the pipe, indicating that the valve is open? Or is the lever at
a right angle, indicating that the valve is closed. If closed,
has the gas been shut off for safety reasons?
NOTE: Before proceeding with the next check, turn OFF
the electrical power supply to the furnace. Remove the con¬
trol access door. The blower access door must be installed to
permit furnace operation. On downflow furnaces, the blower
access door must be removed before the control access door
is removed, then reinstalled.
• Is the control knob on the internal gas valve turned to
the ON position? If it is not, be sure it has not been turned
OFF for the purpose of safety. If nothing else seems to be
amiss, follow the startup procedures found on the furnace.
• If your furnace has a manual ignition (continuous) pilot
system, check for pilot flame. If there is no pilot flame, fol¬
low the manual startup procedures on the furnace label. It
the pilot flame exists, check the control knob on the internal
gas valve. If the knob is in the PILOT position, turn it to
the ON position and complete the startup procedures.
• If your furnace uses an automatic, intermittent ignition
pilot, check the control knob on the internal gas valve to be
sure that it is in the ON position. If it is not, follow the
appropriate startup procedures on the furnace label.
• DOWNFLOW FURNACES ONLY: Check the manual-
reset auxiliary limit switch located on the top right-hand
corner of the furnace. See Fig. 4. If the blower motor fails,
this switch will shut off the furnace. Reset it by pushing the
button on the switch. If it trips again, shut down the fur¬
nace and call for service. Refer to the lighting/operating
instructions label affixed to your furnace blower access door
(See Figs. 1 and 2 for door identification.) for shutdown
procedures.
• Check the manual reset switch for the blocked vent
shutoff system (located on the bottom of the draft diverter).
See Fig. 3 or 4. If the vent is totally obstructed, the blocked
vent shutoff system switch will shut off the furnace internal
gas valve. To reset the switch: remove the furnace control
door, push the reset button located on the back side of the
switch, and reinstall the control door. If the blocked vent
shutoff system switch trips for a second time, shut down
the furnace and call a qualified service agency for sennce.
Refer to the lighting/operating instructions label affixed to
your furnace blower access door (See Figs. 1 and 2 for door
identification.) for shutdown procedures.
• If your furnace still fails to operate, call a qualified serv¬
ice agency for troubleshooting and repairs. Specify the prod¬
uct and serial numbers of your furnace. (You should have
them recorded on page 2 of this manual.) If the dealer ^iows
exactly which furnace you have, he may be able to offer sug
gestions over the phone, or save valuable time throug
i — n kia nnonapfliiftn for the service call.
REGULAR DEALER MAINTENANCE
In addition to the type of routine maintenance you might be
willing to perform, your furnace should be inspected regu¬
larly by a qualified service agency. An inspection (prefera¬
bly each year, but at least every other year) should mclude
the following:
• Inspection of all flue product passages-including the
burners, pilot, heat exchanger, draft diverter, and vent pipe.
• Inspection of all combustion and ventilation air pas¬
sages and openings in the furnace and building to assure
i . i . J *
• Close inspection of all gas pipes leading to and mside of
your home for leaks and/or deterioration.
• Inspection, cleaning, and lubrication (if oil ports are pro¬
vided) of the blower, blower motor, and wheel.
• Routine inspection and cleaning/replacement of the air
filter.
• Inspection of all supply-air and return-air ducts for air
leaks, obstructions, and insulation.
• A check for loose fasteners. Inspection of all electrical
wiring and their connections.
• Operational check of the furnace itself to determine
working condition. Repair or adjustment should be made at
this time.
• Any problems found should be resolved at this time.
Your servicing dealer may offer an economical service con¬
tract that covers seasonal inspections. Ask him for further
details.
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