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Regular Owner Maintenance – All Packaged Systems
You can perform some of the periodic maintenance functions for
the unit yourself; this includes replacing (disposable) or cleaning
(permanent) the air filters, cleaning the cabinet, cleaning the
condenser coil, and conducting a general unit inspection on a
regular basis.
Air Filters
It is very important to keep the central duct system air filters
clean. Be sure to inspect them at least once each month when
the system is in constant operation (in new homes, check the
filters weekly for the first 4 weeks).
If you have a disposable-type filter replace it with a new filter
of the same type and size. DO NOT ATTEMPT TO CLEAN
DISPOSABLE FILTERS.
Permanent-type filters can be cleaned by washing them with a
mild detergent and water. Make sure that the filters are thoroughly
dry before reinstalling them in the unit (or duct system).
Note: It may be necessary to replace permanent filters annually
if washing fails to clean the filter, or if the filter shows signs of
deterioration. Be sure to use the same type and size as was
originally installed.
Unit Cabinet
Even though the unit cabinet is designed to withstand exposure
to outdoor weather, you can extend the life of the cabinet panel
by cleaning and waxing it twice each year. Application of a light
coat of automobile wax is recommended.
Condenser Coil
Unfiltered air circulates through the units condenser coil and can
cause the coil's surface to become clogged with dust and dirt.
Have the coils checked by a service technician each cooling season.
Be sure to keep all vegetation away from the condenser coil area.
General Unit Inspection
Occasionally check over the unit; look and listen for unusual or
abnormal operating characteristics. Do not remove any access
panels. If you suspect your unit is not operating properly, contact
a service technician for instructions.
Never use combustible cleaning fluids on any part of the furnace.