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RT6621031r2
November 2013
This manual is to be used by qualified, professionally trained HVAC technicians
only. Goodman does not assume any responsibility for property damage or
personal injury due to improper service procedures performed by an unqualified
person.
• Refer to Service Manual RS6612006 for troubleshooting information.
• Refer to the appropriate Parts Catalog for part number information.
• Model numbers listed on page 3.
GMS8 33-3/8" Gas Furnace Units
80% AFUE, Single Stage,
Multi-Speed, Upflow Horizontal
TECHNICAL MANUTECHNICAL MANU
TECHNICAL MANUTECHNICAL MANU
TECHNICAL MANU
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Copyright © 2013 Goodman Manufacturing Company, L.P.