5
12. Set your thermostat to the tempera-
ture that satisfies your comfort
requirements. SUGGESTION: Set-
ting the thermostat back a few de-
grees—and compensating for the
difference with warmer clothing—
can make a big difference in your
fuel consumption on extremely
cold days. The few degrees at the
top of your thermostat “comfort
level’’ are the most costly degrees
to obtain.
When the room temperature drops
below the temperature selected on
the thermostat, the furnace will be
switched on automatically. When the
room temperature reaches the degree
selected on the thermostat, the furnace
will be switched off automatically.
Some thermostats have a “fan’’ mode
with 2 selections: AUTO or ON. When
set on AUTO, the furnace blower cy-
cles on and off, controlled by the ther-
mostat. In the ON position, the furnace
blower runs continuously except for a
62-sec delay at the “call for heat.’’ This
keeps the temperature level in your
home more evenly balanced. It also
continuously filters the indoor air.
SHUTTING DOWN
YOUR FURNACE
Should you ever suspect a malfunction
in your furnace, you will need to turn
the furnace off. The following proce-
dures must be followed:
1. Set your room thermostat to
the lowest temperature setting.
(See Fig. 16.)
2. Close the external manual gas
valve. (See Fig. 6.)
3. Turn OFF the electrical supply to
your furnace. (See Fig. 17.)
16
4. Remove the control access door on
your furnace. (See Fig. 8.) Remov-
ing the blower access door is not
required.
5. Turn the control knob or switch on
the gas valve to the OFF position.
(See Fig. 18 or 19.)
17
18
19
6. Replace the control access door.
(See Fig. 13.)
7. If the furnace is being shut down
because of a malfunction, call your
dealer as soon as possible.
PERFORMING ROUTINE
MAINTENANCE
With the proper maintenance and care,
your furnace will operate economically
and dependably. Basic maintenance,
which can easily be accomplished by
someone who follows the directions, is
found on this and the following pages.
However, before beginning
maintenance, follow these safety
precautions:
FILTERING OUT
TROUBLE
A dirty filter will cause excessive stress
on the furnace and can cause it to over-
heat and automatically shut down. The
furnace filter should be checked every
3 or 4 weeks and cleaned if necessary.
If your furnace filter needs replacing,
be sure to use the same size and type of
filter that was originally supplied. Use
the Furnace Filter Table on the next
page and compare your furnace size
with the proper filter size.
The air filter is normally located in the
blower compartment. If the filters have
been installed in another location, con-
tact your dealer for instructions. To in-
spect, clean, and/or replace the air
filter(s), follow these steps:
1. Turn OFF the electrical supply to
the furnace. (See Fig. 17.)
2. Remove control door and blower
access door.
®
FF
O
O
F
F
2
3
1
M
P
ON
O
F
F
C
WARNING
Turn off electrical power sup-
ply to your furnace before re-
moving the access doors to
perform service or mainte-
nance. A failure to follow this
warning could result in per-
sonal injury or death.
CAUTION
Although special care has
been taken to minimize sharp
edges, be extremely careful
when handling parts or reach-
ing into the furnace.
CAUTION
Never operate your furnace
without a filter in place. Doing
so may damage the furnace
blower motor. An accumula-
tion of dust and lint on internal
parts of your furnace can
cause a loss of efficiency.
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