Performing Routine Maintenance; Filtering Out Trouble - Carrier 58WAV User's Information Manual

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4. Remove the control access door on your furnace. (See
Fig. 10 or 11.) On upflow furnaces, removing the blower
access door is not required.
5. Turn the control knob or switch on the gas valve to the
OFF position. (See Fig. 22 or 23.)
6. Replace the control access door. (See Fig. 16 or 17.)
7. If the furnace is being shut down because of a malfunc-
tion, call your dealer as soon as possible.
22
20
21
OR
23
PERFORMING ROUTINE
MAINTENANCE
With 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 begin-
ning maintenance, follow these safety precautions:
!
Turn off electrical power supply to your furnace
before removing the access doors to service or
perform maintenance. A failure to follow this
warning could result in personal injury or death.
!
Although special care has been taken to minimize
sharp edges, be extremely careful when handling
parts or reaching into the furnace.

FILTERING OUT TROUBLE

A dirty filter will cause excessive stress on the furnace, heat
exchanger, and blower motor and can cause it to overheat
and automatically shut down. The furnace filter should be
checked every 3 or 4 weeks and cleaned if necessary.
If installed with factory specified disposable media filter,
check or replace filter before each heating and cooling sea-
son. Replace disposable media filter at least once a year.
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 and match your furnace size with
the proper filter size.
!
Never operate your furnace without a filter in place.
Doing so may damage the furnace blower motor.
An accumulation of dust and lint on internal parts
of your furnace can cause a loss of efficiency.
The air filter for upflow furnaces is normally located in the
blower compartment. (See Fig. 3) or in the factory-supplier
filter cabinet attached to the side or bottom of the blower cab-
inet. Filters for the downflow furnaces are normally located
in the return-air plenum above the blower. If air filter has been
installed in another location, contact your dealer for instruc-
tions. To inspect, clean and/or replace the air filter(s), follow
these steps:
• Upflow Furnaces Only—
1. Turn off the electrical supply to the furnace. (See
Fig. 21.)
2. Remove door/access panel
• AIR FILTER(S) LOCATED IN BLOWER COM-
PARTMENT
Remove control and blower access doors. (See Fig. 10
and 11)
• AIR FILTER LOCATED IN FILTER CABINET
Remove filter cabinet door (See Fig. 30 and 31)
NOTE: It will be necessary to remove 1 thumbscrew.
6
WARNING
CAUTION
CAUTION