USE ONLY GENUINE REPLACEMENT PARTS 39
COMBUSTION BLOWER: The blower provides the air that mixes with the gas in the burners for the combustion process. The
blower operates during the pre-purge time (approximately 30 seconds) at the beginning of each ignition cycle, during the entire time
the gas valve is open and the burners are firing, and for 30 seconds after the gas valve closes. See Figure23: Location of
Components and Figure30: Blower.
To replace the blower:
1. Turn pump, gas supply, and heater power “OFF”.
2. Remove the front access panel.
3. Disconnect the blower wire harness from the
ignition control board.
4. Disconnect the tubing from the hose barb on the
blower housing.
5. Remove the blower from the air box cover (4
screws).
6. Remove the blower air inlet plate from the blower
(4 screws).
7. Be sure the blower outlet gasket is in place before
proceeding. Reverse the above procedure to
reassemble the blower.
Figure30: Combustion Blower
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