8
6.
Replace main furnace 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
NOTE:
The quali
fi
ed installer or agency must use only factory-authorized replacement parts, kits, and accessories when modifying
or repairing this product.
Installing and servicing heating equipment can be hazardous due to gas and electrical components.
Only trained and quali
fi
ed personnel should install, repair, or service heating equipment. Untrained personnel can perform basic
maintenance functions such as cleaning and replacing air
fi
lters.
All other operations must be performed by trained and quali
fi
ed service agency personnel. Observe safety precautions in this manual,
on tags, and on labels attached to the furnace, and other safety precautions that may apply.
With proper maintenance and care, your furnace will operate economically and dependably. Instructions for basic maintenance are
found on this and the following pages. However, before beginning maintenance, follow these safety precautions:
FILTERING OUT TROUBLE
A dirty air
fi
lter will cause a loss of air
fl
ow in your duct system. When excessive loss of air
fl
ow occurs, the furnace may cycle on its
safety controls. If this condition is left unattended, the furnace will eventually lock out. It is recommended that the furnace
fi
lter be
checked every 3 or 4 weeks and cleaned if necessary.
If installed with factory-speci
fi
ed disposable media
fi
lter, check or replace
fi
lter before each heating and cooling season. Replace
disposable media
fi
lter at least once a year.
The air
fi
lter is normally located in the blower compartment. (See Fig. 1.) If the air
fi
lter has been installed in another location, contact
your dealer for instructions. To inspect, clean, and/or replace the air
fi
lter(s), follow these steps:
1. Turn off electrical supply to the furnace. (See Fig. 21.)
2. Remove main furnace door. (See Fig. 22.)
3. Remove blower access panel. (See Fig. 23.)
NOTE:
It will be necessary to remove 2 screws.
CAUTION:
UNIT AND PROPERTY DAMAGE
Failure to follow this caution may result in damage to the furnace and other property damage.
Furnace is not to be installed, operated, and then turned off and left turned off in an unoccupied structure dur-
ing winter. (See “Heading South for the Winter?” procedures in maintenance section on page 11).
WARNING:
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury/death.
Turn off electrical power supply to your furnace before removing the main furnace door to service or perform
maintenance.
CAUTION:
CUT HAZARD
Failure to follow this caution may result in minor personal injury.
Although special care has been taken to minimize sharp edges, be extremely careful when handling parts or
reaching into the furnace.
CAUTION:
UNIT PERFORMANCE HAZARD
Failure to follow this caution may result in product damage.
Never operate your furnace without a filter in place. Doing so may damage the furnace 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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