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Video & Articles: Appliance & Equipment RepairLennox Furnace Blower Motor Replacement #LX7920
Lennox Furnace Blower Motor Replacement #LX7920
Skill Level
Total Parts Cost
$332.16Estimated Savings
$112.5007:01
- Description
This video provides step-by-step instructions for replacing the blower motor on Lennox furnaces. The most common reasons for replacing the blower motor are when the furnace is loud or the blower motor does not run, but other more common problems have already been checked.
All of the information in this blower motor replacement video is applicable to the following brands: Lennox
Tools needed: 1/4 inch socket, 5/16 inch socket, adjustable wrench, pliers, 3/8 inch socket
Connect With Us!
All of the information in this blower motor replacement video is applicable to the following brands: Lennox
Tools needed: 1/4 inch socket, 5/16 inch socket, adjustable wrench, pliers, 3/8 inch socket
Connect With Us!
Step By Step Instructions
1
In this video, we will show one or more of these icons to alert you when to use caution before you replace the blower motor in your furnace.
2
First, turn off the power to the furnace.
3
Unthread the retaining knobs securing the upper access panel and remove the panel.
4
Use a quarter inch socket or nut driver to unthread the mounting screws securing the lower access panel.
5
Lift the panel up to remove.
6
To ensure the run capacitor is discharged, place a screwdriver with an insulated handle across the terminals.
7
Avoid touching the screwdriver blade.
8
Now, disconnect the wires from the capacitor terminals.
9
If necessary, note the orientation of the thermostat wires, then disconnect them from the control board to move them out of the way.
10
Note the orientation of the blower motor wires, then disconnect them from the board.
11
Cut the zip ties securing the control board wires.
12
Use the quarter inch socket or nut driver to loosen the screws securing the control board mounting panel.
13
Slide the panel forward to detach and move it out of the way.
14
Note where the blower assembly mounting rails are positioned on the support.
15
Then, use a 5/16 inch socket or nut driver to unthread the screws securing the rails.
16
With the screws removed, carefully slide out the blower assembly.
17
Use an adjustable wrench to loosen the set screw to release the blower wheel from the motor shaft.
18
Now, tip the assembly on its side with the motor facing up.
19
Remove the screw to detach the grounding wire.
20
Cut the zip ties securing the motor wires.
21
Now, use a 3/8 inch socket to unthread the blower motor mounting bolts.
22
Note the orientation of the old motor, then lift it off of the blower housing.
23
Install the new blower motor by inserting the shaft into the blower wheel.
24
As you properly align the motor on the housing, confirm that the shoulder washers are intact on the motor mounting brackets.
25
Then, thread and tighten the bolts to secure the motor.
26
Use a zip tie to secure the motor wires.
27
Make sure the grounding wire is secured with the screw.
28
Now, return the blower assembly to its upright position with the flat side of the motor shaft facing the set screw.
29
Confirm that the blower wheel is centered in the housing, then tighten the setscrew.
30
Realign the blower assembly mounting rails with the slots on the support and slide the assembly into position.
31
Replace the screws to secure the rails.
32
Reposition the control board panel on the support and tighten the screws to secure.
33
Attach the blower motor wires to the appropriate terminals on the control board.
34
Connect the capacitor wires if applicable.
35
Reconnect the thermostat wires as well.
36
Use a zip tie to secure the control board wires.
37
Replace the lower access panel by aligning the bottom edge first.
38
Thread and tighten the screws to secure.
39
Realign the top edge of the upper access panel, then thread the retaining knobs to secure.
40
With the repair completed, turn the power back on and your furnace should be ready for use.
Description
This video provides step-by-step instructions for replacing the blower motor on Lennox furnaces. The most common reasons for replacing the blower motor are when the furnace is loud or the blower motor does not run, but other more common problems have already been checked.
All of the information in this blower motor replacement video is applicable to the following brands: Lennox
Tools needed: 1/4 inch socket, 5/16 inch socket, adjustable wrench, pliers, 3/8 inch socket
Connect With Us!
All of the information in this blower motor replacement video is applicable to the following brands: Lennox
Tools needed: 1/4 inch socket, 5/16 inch socket, adjustable wrench, pliers, 3/8 inch socket
Connect With Us!
Step-By-Step Instructions
1
In this video, we will show one or more of these icons to alert you when to use caution before you replace the blower motor in your furnace.
2
First, turn off the power to the furnace.
3
Unthread the retaining knobs securing the upper access panel and remove the panel.
4
Use a quarter inch socket or nut driver to unthread the mounting screws securing the lower access panel.
5
Lift the panel up to remove.
6
To ensure the run capacitor is discharged, place a screwdriver with an insulated handle across the terminals.
7
Avoid touching the screwdriver blade.
8
Now, disconnect the wires from the capacitor terminals.
9
If necessary, note the orientation of the thermostat wires, then disconnect them from the control board to move them out of the way.
10
Note the orientation of the blower motor wires, then disconnect them from the board.
11
Cut the zip ties securing the control board wires.
12
Use the quarter inch socket or nut driver to loosen the screws securing the control board mounting panel.
13
Slide the panel forward to detach and move it out of the way.
14
Note where the blower assembly mounting rails are positioned on the support.
15
Then, use a 5/16 inch socket or nut driver to unthread the screws securing the rails.
16
With the screws removed, carefully slide out the blower assembly.
17
Use an adjustable wrench to loosen the set screw to release the blower wheel from the motor shaft.
18
Now, tip the assembly on its side with the motor facing up.
19
Remove the screw to detach the grounding wire.
20
Cut the zip ties securing the motor wires.
21
Now, use a 3/8 inch socket to unthread the blower motor mounting bolts.
22
Note the orientation of the old motor, then lift it off of the blower housing.
23
Install the new blower motor by inserting the shaft into the blower wheel.
24
As you properly align the motor on the housing, confirm that the shoulder washers are intact on the motor mounting brackets.
25
Then, thread and tighten the bolts to secure the motor.
26
Use a zip tie to secure the motor wires.
27
Make sure the grounding wire is secured with the screw.
28
Now, return the blower assembly to its upright position with the flat side of the motor shaft facing the set screw.
29
Confirm that the blower wheel is centered in the housing, then tighten the setscrew.
30
Realign the blower assembly mounting rails with the slots on the support and slide the assembly into position.
31
Replace the screws to secure the rails.
32
Reposition the control board panel on the support and tighten the screws to secure.
33
Attach the blower motor wires to the appropriate terminals on the control board.
34
Connect the capacitor wires if applicable.
35
Reconnect the thermostat wires as well.
36
Use a zip tie to secure the control board wires.
37
Replace the lower access panel by aligning the bottom edge first.
38
Thread and tighten the screws to secure.
39
Realign the top edge of the upper access panel, then thread the retaining knobs to secure.
40
With the repair completed, turn the power back on and your furnace should be ready for use.
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