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SHUTTING DOWN
YOUR FURNACE
Should you need to shut down your
furnace for service or maintenance,
you will need to turn the furnace off.
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The following procedures must be
followed:
1. Set your room thermostat to the
lowest temperature setting.
(See Fig. 17.)
2. Close the external manual gas
valve. (See Fig. 7.)
3. Turn off electrical supply to the
furnace. (See Fig. 18.)
4. Remove main furnace door.
(See Fig. 9.)
5. Turn control switch or knob on the
gas valve to OFF position.
(See Fig. 19 or 20.)
6. Replace main furnace door.
(See Fig. 14.)
7. If the furnace is being shut down
because of a malfunction, call
your dealer as soon as possible.
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PERFORMING
ROUTINE
MAINTENANCE
With proper maintenance and care, your
furnace will operate economically and
dependably. Instructions for basic main-
tenance are found on this and the follow-
ing pages. However, before beginning
maintenance, follow these safety pre-
cautions:
FILTERING OUT
TROUBLE
A dirty air filter will cause a loss of airflow
in your duct system. When excessive loss
of airflow occurs, the furnace may cycle
on its safety controls. If this condition is
left unattended, the furnace will eventu-
ally lock out. It is recommended that the
furnace air filter be checked every 3 or 4
weeks and cleaned if necessary.
The air filter is normally located in the
blower compartment. (See Fig. 2.)
If air filter has been installed in another
location, contact your dealer for
instructions. To inspect, clean, and/or
replace the air filter(s), follow these
steps:
1. Turn off electrical supply to the
furnace. (See Fig. 18.)
2. Remove main furnace door.
(See Fig. 21.)
3. Remove blower access panel.
(See Fig. 22.)
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®
CAUTION
Furnace is not to be installed,
operated, and then turned off
and left turned off in an unoc-
cupied structure during winter.
(See winterizing procedures in
maintenance section.)
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WARNING
Turn off electrical power sup-
ply to your furnace before re-
moving the main furnace door
to service or perform mainte-
nance. 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 the air filter in place.
Doing so may damage the fur-
nace blower motor. An accu-
mulation of dust and lint on
internal parts of your furnace
can cause a loss of efficiency.
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