Amana GMSS9 Series Service Instructions Manual page 33

SYSTEM OPERATION
furnace is not improperly sloped. Make sure air condition-
ing coil drain is not interfering with furnace drain.
Other Causes
1. Manifold Gas Pressure must be set for the gas being
used, Natural or L.P., high and low firing rates. If con-
verted to L.P. gas, check size of all orifices
2. Remove Draft Inducer, Check the integrity of the gasket
between the inducer and the collector box cover, any air
leak here will have a negative effect on combustion.
Check the orifice hole in the collector box, it must be
free of burrs on both sides
3. Make sure burners are clean, not out of position and line
up correctly with exchanger tubes, including the heat
exchanger orifice plate between the burners and the heat
exchanger tubes, make sure it is not loose, missing a
screw or hanging down between the burners and heat
exchangers causing flame impingement.
4. Make sure the field installed gas line is not binding and
causing distortion of burner assembly
5. If the furnace is installed as a one pipe system; make
sure the surrounding area and structure are adequate
to provide combustion air
6. Make sure there are no cabinet air leaks allowing sup-
ply air to affect combustion
7. If heat exchanger integrity is uncertain, follow proce-
dures in Service Bulletin SF-041
33