31
EN
Furnaces
7.2 Servicing the blower wheel
Perform the steps in Accessing the furnace components (on page 30) before proceeding with service.
Replace the Blower Wheel
18
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.
19
Blower Wheel
Compression Ring
Motor
➤ Remove the compression ring holding the blower
wheel to the motor.
➤ Slide the existing wheel off of the motor sha and
slide the new wheel into place. Replace the ring.
➤ Reverse the steps for re-installation.
7.3 Servicing the burner head
Perform the steps in Accessing the furnace components (on page 30) before proceeding with service.
Replace the Burner Head
20
Valve
Assembly
➤ Remove the screws securing the burner and valve
assembly to the furnace.
➤ Disconnect the gas line to the gas valve.
➤ Remove the grommet and pull the electrode lead
through the hole in the furnace wall.
➤ Gently pull the burner and valve assembly out of
the furnace.
21
Burner Head
Valve
Assembly
➤ Remove the screws holding the burner and valve
together.
➤ Slide the existing burner away from the gas valve
and replace with a new burner.
➤ Reverse the steps for re-installation.
I
The burner head, electrode, and gas valve
on the late model 79 series furnaces are
individually accessible. However, to service
these same components on the late model 85
and 89 series, remove the complete assembly.
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