Carrier A10247 - Manual (Page 6)

PERFORMING ROUTINE MAINTENANCE
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:
^ WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Turn off electrical power supply to your furnace before
removing the access doors to service or perform
maintenance.
Eig. 13 - Turn Off Electrical Supply
2, Remove filter cabinet door (See Fig, 14 and 15,)
NOTE: It may be necessary to remove 1 thumbscrew.
^ CAUTION
CUT HAZARD
Failure to follow this caution may result in personal injury.
Although special care has been taken to minimize sharp
edges, be extremely careful when handling parts or reaching
into the furnace. Wear safety glasses, gloves, and
appropriate protective clothing.
FILTERING OUT TROUBLE
^ 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
accumulation of dust and lint on internal parts of your
furnace can cause a loss of efficiency.
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 4 weeks and cleaned or replaced if necessary.
If installed with factory specified disposable media filter, check or
replace filter before each heating and cooling season. Replace
disposable media filter at least twice a year.
If your furnace filter needs replacing, be sure to use the same size
and type of filter that was originally specified. The air filter for the
furnace may be located in a filter cabinet attached to the side or
bottom of the furnace. 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 the electrical supply to the furnace.
Fig. 15 - Removing Bottom Filter Cabinet Door
3, Slide air filter out of filter cabinet. Keep dirty side up (if
dirty) to avoid spilling dirt, (See Fig, 16 and 17,)