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See Table
BLOWER
MOTOR
SINGLE
SPEED
ON/OFF
SWITCH
C
R
G
W
GAS VALVE
HI-LIMIT
AUX. LIMIT
TRANS-
FORMER
PRESSURE
SWITCH
654321
654321
COMBUSTION FAN
L1 N
CR
24 V
115 V
21
1
4
5
2
6
3
1
2
3
4
5
6
7
8
9
IGNITOR
BLUE
BLUE
BLACK
GREEN
YELLOW
YELLOW
BLACK
BLACK
ORANGE
ORANGE
BLACK
WHITE
L1
NEUTRAL
GROUND SCREW
FURNACE ELECTRICAL BOX
24V
N
E
U
C
H
L1
XFRM
TIE
WIRE
See Table
CONNECTOR
HOUSING CAP
GROUND
SCREW
BLACK
BLACK
CONTROL LIGHT STATUS
RED YELLOW
Steady ON Control OK Steady ON Good Flame Signal
Steady OFF No power Blinking Weak Flame Signal
Rapid Flash False flame or internal control fault Steady OFF No Flame Signal
1 Flash Limit switch is open
2 Flashes Pressure switch is open with inducer on
3 Flashes Pressure switch is closed with inducer off
4 Flashes Lockout due to failed ignition
5 Flashes 115 vac & neutral reversed or no ground
CONTROL
LIGHTS
RED
Jumper must be removed if
converting to a multispeed blower.
Jumper is required for M1MA
models and M1MB 090
A/C & Heating Speeds: Refer to
Table 10, A/C Blower Selection
in the manual
BLACK
WHITE
WHITE
BLACK
BLACK
GREEN
RED
GRAY
WHITE
RED (LO)
BLACK (HIGH)
BLUE (MED. HI)
ORANGE (MED. LO)
WHITE
RED (LO)
BLACK (HIGH)
BLUE (MED. HI)
WHITE
654321
LEGENDS
115V: FIELD 115V:
24V: FIELD 24V:
BLOWER
MOTOR
4 SPEED
NOTES
1. Incoming power must be polarized. Observe color
coding. (See furnace data label for electrical
information.)
2. If any of the original wires (as supplied with the
appliance) must be replaced, use 105˚C Thermoplastic
type wire or its equivalent.
SUPPLIED
BY INSTALLER
C W G R
COM
BLUE
BLOWER
MOTOR
3 SPEED
See Table
See Table
710152 07/01
Figure 44. Gas Direct Ignition Furnace, Heating & A/C Ready - All M1M Models
Blower Wire Table
Blower Wire Connections
Furnace
Wire #1
Wire #2 Wire #3 Wire #4
Model
Red
Black Blue Orange
M1MA 056/
Tie Tie Tie
Control
070/077/090
Wrapped Wrapped Wrapped
Board "H"
M1MB
Tie Control Tie Control
056
Wrapped Board "C" Wrapped Board "H"
M1MB
Tie Tie Control Control
070/077
Wrapped Wrapped Board "H" Board "C"
M1MB
Tie Control Tie Tie
90
Wrapped Board "H" Wrapped Wrapped
M1M(C,D)
Control Tie Tie Control
056/070
Board "H" Wrapped Wrapped Board "C"
M1M(C,D)
Tie Tie Tie Control
077/090
Wrapped Wrapped Wrapped Board "H"