VENT SENSOR ASSEMBLY
Figure 5-4.5. Vent Sensor Assembly
Note: for steps 1-5, set the heater on the Vent Sensor End. If fuel has collected in
the heat exchanger, it must be properly disposed of in accordance with the local
Remove Top Shell (ref. 5.1.2)
Remove Bottom Shell (ref. 5.1.3)
Disconnect the Logic Harness end of the Vent Sensor Connector from the Vent Sensor Connector (J5).
Note: The Vent Sensor Connector has a self locking tab that needs to be lifted to
allow the two halves of the connector to come apart.
Using a 5/16" socket or nut driver, remove the single hex head bolt (from the Burner Housing to the Heat
Exchanger) which secures the Vent Sensor Connector (J5) Clip.
Gently pry open the channel on the side of the Heat Exchanger and remove the Vent Sensor wire.
Tip: Set the Heater on its side with the Fuel Inlet facing Upwards. If possible have
the Vent Sensor ONLY overhang the edge of the work bench.
Using a #2 cross-tip screwdriver, remove the three (3) screws from the Vent Sensor. Gently pull the Vent
Sensor away from the Heat Exchanger.