IGNITOR
INDUCER
FLAME SENSOR
C
VENT
LIMIT
DOOR
SWITCH
R
4 SPEED MOTOR
FLAME
ROLLOUT
GAS
VALVE
H
MH
ML
L
C
BLOWER
DECK
LIMIT
SUPPLY
AIR LIMIT
PRESSURE
SWITCH
RCYGW
LOW
ML
MH
HIGH
EAC
L1
XFMR
HUM
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
COM
3 AMP FUSE
24V
24 V
120 V
WHITE W/ BLK STRIPES
BLK W/ WHITE STRIPES
1234
1234
11
22
33
44
55
66
77
88
99
L1A
NEUTRALS
GREEN
YELLOW
RED
R
C
TX
RX
W
COM
1
2
1
2
1
2
1
2
1234
WHITE
RED
BLUE
ORANGE
BLACK
WHITE
BLACK
BLUE
BLUE
BLUE
BLUE/WHITE
BLUE
ORANGE
ORANGE
GREEN
WHITE
BLUE
YELLOW
RED
ORANGE
BLACK
WHITE
BLUE
BLACK
RED
BLACK
BLACK
BLACK
BLUE
GREEN
BLUE
BLACK
BLACK
WHITE
YELLOW
SINGLE STAGE
THERMOSTAT
TO OUTDOOR UNIT
FIELD WIRING
LEGEND:
LOW VOLTAGE
HIGH VOLTAGE
WIRING DIAGRAM
For 90+ Single Stage Furnaces
Refer to the Installation Instructions
provided with the furnace for the
proper heating and cooling speeds
for your application.
If any of the original wire as supplied with
the furnace must be replaced, it must be
replaced with wiring material having a
temperature of at least 105 C.
Use copper conductors only.
Diagnostic Description
Green LED Red LED
Control Fault (No Power) O O
L1 / Neutral Polarity Fault Flash Flash
1 Hour Lockout
Normal Operation On On
Pressure Switch Closed Fault On Flash
Pressure Switch Open Fault Flash On
Open Limit Switch Fault Flash O
Diagnostic Description
Low Flame Sensor Signal
Flame Present
FAULT CONDITIONS
Yellow LED
Continuous Flash
On
Alternating Flash
711216C
(Replaces 711216B)
07/14
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