37
EN
Furnaces
Replace the Motor
35
Blower Wheel
Blower
Housing
(Front)
Blower
Housing
(Rear)
➤ Remove the top screws on the blower housing.
➤ Remove the bottom screws on the blower
housing.
➤ Gently pull the front blower housing forward to
expose the blower wheel.
36
Blower Wheel
Combustion
Wheel
Motor
Compression
Ring
➤ Remove the compression ring holding the blower
wheel to the motor.
➤ Slide the existing wheel off of the motor sha.
➤ Remove the compression ring holding the
combustion wheel to the motor.
➤ Slide the existing compression wheel off of the
motor sha.
➤ Remove the wires from the motor.
➤ Remove the existing motor. Replace with a new
motor.
➤ Reverse the steps for re-installation.
7.10 Servicing the relay
Perform the steps in Accessing the furnace components (on page 30) before proceeding with service.
Replace the External Relay
37
Blower Housing
Relay
I
The external relay is used in older furnaces and
is located on the blower housing.
➤ Remove the screws holding the relay to the blower
housing.
➤ Disconnect the four wires connected to the relay:
– Power in from the circuit breaker switch
– The ground
– Power to the motor
– Power in from the thermostat
➤ Li the relay away from the housing and replace it.
➤ Reverse the steps for re-installation.
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