Carrier 58MTA - Manual (Page 11)

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• 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 back page. Should you ever require service, you
will have ready access to the information needed by your ser-
vice representative.
This furnace has a light-emitting-diode (LED) status code dis-
play to aid the installer, service technician, or homeowner while
installing or servicing the unit. The LED code can be seen by
removing the main furnace door and viewing the LED through
the view port in the blower access panel.