Carrier WEATHERMAKER INFINITY 58MCA - Manual (Page 10)

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• Perform an operational checkout to determine whether your
furnace is working properly and if it requires adjustments.
• Inspect all condensate drain tubes and condensate trap assem-
bly for leaks. The condensate removal system should be cleaned
annually by a qualified service agency. Refer to the Service and
Maintenance Instructions for further information.
• Examine the physical support of the furnace. Support should
be sound with not cracks, sagging, gaps, etc. around the base.
• Check furnace for any obvious signs of deterioration.
BEFORE YOU REQUEST A SERVICE
CALL
If your furnace is not operating or not performing properly,
you may save the expense of a service call by checking a few
things yourself before calling for service.
FOR INSUFFICIENT AIRFLOW:
• Check for dirty air filter(s).
• Check for blocked return-air or supply-air grilles throughout
your home. Ensure they are open and unobstructed.
If problem still exists, call your dealer for service.
IF FURNACE FAILS TO OPERATE:
Follow this checklist step by step, advancing to the next step
only if furnace fails to start.
• Check thermostat for proper temperature. Is thermostat set
above room temperature?
• Is thermostat set on HEAT?
• Check fuses and circuit breakers. Is electrical supply on?
• Is manual shutoff valve in gas supply pipe in open position?
(Follow start-up procedures if you open gas valve.)
NOTE: Turn off electrical supply before continuing with
checklist.
• Is control switch on gas valve in ON position? (Follow start-
up procedures if you must reset switch to ON position.)
• Check manual reset flame rollout switch located on the burner
box. (See Fig. 3 or 4.) if furnace has experienced high temper-
ature conditions, this switch will shut off the furnace. Reset it
by pushing the button on the switch. If it trips again, shut down
the furnace and call for service. See “Shutting Down Your Fur-
nace” section in this manual.
• Check for obstructions around the vent termination.
If the furnace still fails to operate, call your service representa-
tive.
For your convenience, record the furnace product and serial
numbers on page 2. should you ever require service, you will
have ready access to the information needed by your service
representative.
This furnace has a light-emitting-diode (LED) code display to
aid the installer, service technician, or homeowner while install-
ing or servicing the unit. The LED code can be seen by remov-
ing the main furnace door and viewing the LED through the
view port in the blower access panel.