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Then inspect the elbow, flue
connection area, and the vent pipe
for rust.
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3. Inspect the vent pipe for a sag,
holes, or a disconnection. A hori-
zontal vent pipe must slope upward
away from furnace. If rusty joints
or seams, or signs of water leakages
are found, call your dealer for
service.
4. Restore electrical power to the fur-
nace. (See Fig. 12.)
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.
6. Replace access door. (See Fig. 11.)
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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 case, 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 board.)
Has a circuit breaker tripped?
• Is the manual shutoff 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 right angles (closed)?
NOTE:
Before proceeding with the
next checks, turn OFF the electrical
power supply to the furnace. Remove
the access door.
• Is the switch on the gas valve turned
to the ON position? If this or the pre-
ceding check shows an interruption 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.
CAUTION
If dirt, rust, soot, or scale accu-
mulations are found, call your
servicing dealer. DO NOT
OPERATE THE FURNACE.
!