Carrier 58TUA User's Information Manual page 10

7. Inspect the return-air duct connection(s) at the furnace to
ensure it is physically sound, sealed to the furnace casing,
and terminates outside the space containing the furnace.
8. Inspection of furnace installation for proper support and
any obvious deterioration of the furnace. The support
must be sound and without sags, gaps, cracks, etc., around
the furnace base so as to provide an air seal between the
support and furnace.
9. A check for loose connections attaching individual compo-
nents. Inspection of all electrical wiring and their connections.
10. Operational check of the furnace itself to determine working
condition. Repair or adjustment should be made at this time.
Ask your servicing dealer for further details about an econom-
ical service contract that covers seasonal inspections.
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