Thermo Pride OME-72D36 Installation And Service Manual page 42

All installations and services must be performed by qualified service personnel.
To vacuum and brush the outer radiator of the heat exchanger, go through the cleanout
openings in both directions, as shown in Figure 8.
Figure 8.
Reassemble the furnace to the original factory-built condition. Remount the burner,
being certain that the air tube is properly inserted into the chamber opening. If heavy soot
deposits were found in the heat exchanger, this indicates that the burner may be out of
adjustment. Reset the burner, as indicated under the "BURNER OPERATION AND
ADJUSTMENT", SECTION L. : Do not start burner unless blower door is
secured in place.
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