Blower Speed Taps Leadless Motors; G23(X) Blower Removal; To Change Blower Speed; Blower Speed Taps Leaded Motors - Lennox G23Q2-50 Unit Information

G23(X) BLOWER REMOVAL

To Remove Blower:
1. Turn off line voltage
69 from P69 located
Unplug J
on blower deck.
2. Disconnect thermostat wiring
connections by removing low
voltage terminal strip.
3. Disconnect J20/P20 located on
blower deck.
4. Disconnect J43/P43 from blow-
er motor.
5. Loosen screws (2) and remove
control box from unit. Holes
are slotted so screws do not
need to be removed.
6. Remove screws
move blower from unit.
D-Blower Speed Taps Leadless Motors
(-1, -2, -3 and -4 Models)
Blower speed tap selection is accomplished by changing the
taps at the blower motor harness connector. Disconnect har-
ness connector from motor to expose speed selectors.
Blower speed selections are listed in table 20.

To Change Blower Speed:

1 - Turn off electric power to furnace.
2 - Remove blower access door. See figure 1.
3 - Disconnect blower motor harness from motor.
4 - Pull harness connector and wires through blower ac-
cess panel opening.
5 - Select desired speeds for heating and cooling. (Red =
heating, Black = cooling, White = common). See table
20.
6 - Depress harness connector tab to release wire termi-
nal. Select connector location for new speed (refer to
unit wiring diagram). Insert wire terminal until it is se-
curely in place. See figure 39.
7 - Replace harness connector to motor .
1
power.
6
(2) and re-
TABLE 20
5
5
FIGURE 38
DEPRESS TAB TO RELEASE
WIRE TERMINAL. SELECT CON-
NECTOR LOCATION FOR NEW
SPEED (REFER TO UNIT WIRING
DIAGRAM). INSERT WIRE UNTIL
IT IS SECURELY IN PLACE.
*
NOTE-Q3(X)-100 furnaces use a 4 tap motor with low
speed permanently blocked off so it cannot be used. Do
not attempt to operate unit on low speed tap.
E-Blower Speed Taps Leaded Motors
Blower speed tap changes are made on the SureLight
control board. See figure 21. Unused taps must be se-
cured on dummy terminals "PARK M1" and or "PARK M2"
on the SureLight board. The heating tap is connected to
the "ACB HEAT " terminal and the cooling tap is connected
to the "ACB COOL" terminal. The continuous blower tap is
connected to the "ACB LOW" terminal.
To change existing heat tap, turn off power then switch out
speed tap on "ACB HEAT" with tap connected to "PARK
M1" or "PARK M2". See table 21 for blower motor tap col-
ors for each speed.
3DJH 
2
BLOWER SPEED TAP SELECTION
LEADLESS MOTORS
FIGURE 39
-5 and -6 Models
3
4
HARNESS
CONNECTOR
MOTOR