Blower access door switch opens 115-v power to control. No
component operation can occur. Caution must be taken when
manually closing this switch for service purposes. Failure to
follow this warning could result in personal injury or death.
d. BRIEFLY short (jumper) TEST, 3/16 in. quick connect
terminal on control (adjacent to LED status light), and
C
OM
-24V terminal on furnace control thermostat terminal
block. (See Fig. 7.)
NOTE:
If TEST to C
OM
-24V terminals are jumpered longer than
2 sec, LED will flash rapidly, and test request will be ignored.
e. Component Test will function as described in item 2 above.
f. Check LED status.
g. If LED status indicates proper operation, RELEASE
BLOWER ACCESS DOOR SWITCH, replace blower
access door, and replace control access door.
WIRING DIAGRAMS
Refer to Fig. 5, 6, and 7 for the 58YAV furnace wiring diagrams.
TROUBLESHOOTING
Refer to service label. (See Fig. 8.) The Troubleshooting Guide can
be a useful tool in isolating furnace operation problems. Beginning
with the word
″
Start,
″
answer each question and follow the
appropriate arrow to the next item.
The Guide will help you identify the problem or failed component.
After replacing any component, verify correct operation sequence.
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