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27
XI. Maintenance
WARNING
To prevent death or personal injury due to
electric shock, disconnect electrical power
before performing any maintenance.
IMPORTANT NOTE: Handle the ignitor with care. Touch-
ing the ignitor body with bare fingers, rough handling, or
vibration could result in early ignitor failure. Only a qualified
servicer should ever handle the ignitor.
Have the furnace checked at least once a year, before the
heating season begins, to be sure there is adequate com-
bustion air and the vent system is working properly.
Have vent pipe checked to be sure it is not blocked by debris
which could permit fumes to enter the house. Replace any
rusted or leaking sections of vent pipe.
AIR FILTER
WARNING
To prevent death, personal injury or property
damage due to fire, never operate furnace
without a filter installed. Dust and lint will
build up on internal parts resulting in loss
of efficiency, equipment damage and
possible fire.
A return air filter is not supplied with this furnace; however,
there must be a means of filtering all of the return air. The
installer will supply filter(s) at the time of installation.
Filters should be inspected, cleaned or changed every two
months or as required. It is the owner’s personal responsi-
bility to keep air filters clean. Remember - dirty filters are the
most common cause of inadequate heating or cooling
performance.
WARNING
To prevent death, personal injury or property
damage due to electrical shock, disconnect
electrical power to furnace before removing
filter or performing any other maintenance.
Become familiar with filter location and procedures for
removal, cleaning and replacing them. If help is needed,
contact the installer of the furnace or a qualified servicer.
AIR FILTER - UPFLOW FURNACES
If the filter is in the furnace retaining rails, remove it as
follows: Pull off the non-louvered door. The blower motor
will automatically stop through the interlock switch.
Grasp the lower portion of the filter, lift up to disengage it
from the lower railing, move towards blower, drop filter
down. Pull filter outward (Figure 43).
Front of Furnace
Blower
Grab Here
And Lift
Filter
Front of Furnace
Blower
1. Lift filter above bottom 2. Tilt filter to clear rail.
rail.
Front of Furnace
Blower
Front of Furnace
Blower
3. Lower filter below top 4. Pull filter out.
rail.
Figure 43
Filter Removal
Replace the filter with the same type and size filter when
needed.
Use a vacuum cleaner to clean out the blower area and the
adjacent area of the return air duct.
Clean, wash and dry a permanent filter. When using a metal
filter, both sides should be sprayed with a dust adhesive as
recommended on adhesive container. Spray adhesives for
use with permanent metal filters can be found at some
hardware stores. Reinstall filter by placing it into the furnace
along the side of the blower. Engage filter in top rail, move
toward side of furnace and drop it into the bottom rail. BE
SURE AIRFLOW DIRECTION ARROW POINTS TO-
WARDS THE BLOWER.
When the filter is located in the bottom of the furnace on a
bottom return system the filter is held in place by a sheet
metal retainer strap. To change and clean the filter slide one
end of the retainer towards the front and remove filter.
AIR FILTER - COUNTERFLOW FURNACES
A furnace mounted filter rack, shipped with the furnace, can
be used in counterflow installation.