9
33
34
35
3. Inspect the vent pipe for a sag, holes, or a disconnection.
A horizontal vent pipe must slope upward. If rusty joints
or seams, or signs of water leakages are found,
call your dealer for service.
4. Replace the access doors and restore electrical power
to the furnace. Be sure bottom door flange is inside of
the furnace casing. (See Fig. 16 and 17, and 26.)
5. Start the furnace and observe its operation. If possible,
watch the burner flames. Are they burning bright blue?
If not or if you suspect some other malfunction, call
your servicing dealer.
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 of the
problem, call your servicing dealer.
If your furnace isn’t operating at all, check the following list
for easily solved problems:
• Is your thermostat set above room temperature? Is the
HEAT mode selected?
• Is the electrical power supply switch on? Is the blower
access door firmly in place? Are any fuses blown? (There is a
fuse on the furnace control.) Has a circuit breaker tripped?
• Is the manual shut-off valve in the gas supply pipe leading
to the furnace open? Does the lever point in the same direction
that the pipe runs (open)? Or is it at a right angle to the pipe
(closed)?
NOTE: Before proceeding with the next checks, turn off the
electrical power supply to the furnace. Remove access doors.
• Is the control knob or switch on the gas valve turned to the
ON position? If this or the preceding check shows an interrup-
tion in the gas supply, make sure the gas has not been shut off
for safety reasons. If nothing else seems to be wrong, follow the
startup procedures found on pages 4 and 5 of this booklet.
• If for some reason the vent is blocked, the draft safeguard
switch will shut off the furnace. Reset the switch by pushing
the button located on top of the switch. (See page 2 or 3 for
switch location.)
If the switch trips a second time, turn off the furnace and call
for service.
• Downflow/Horizontal Only—Check the manual reset aux-
iliary limit switch (when used) located on the blower housing.
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,
turn off the furnace and call for service.
• Check the manual reset limit switch(es) located near the
burners. If the furnace has experienced a high-temperature con-
dition due to inadequate combustion air, these switches will
shut off the furnace. Reset the switch(es) by pushing the button
on the switch. If the switch trips a second time, turn off the
furnace and call for service.
• If your furnace still fails to operate, call your servicing deal-
er for troubleshooting and repairs. Tell your dealer the model
and serial numbers for your furnace. (You should have them
recorded on page 8 of this booklet.) By knowing exactly which
furnace you have, the dealer may be able to offer suggestions
WARNING
If holes are found or if the vent pipe is obstructed
or is not connected, toxic fumes can escape into
your home. DO NOT OPERATE YOUR FURNACE.
Call your dealer for service. A failure to follow this
warning could result in personal injury or death.
!
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