Goodman GMS80403A A Series User Manual

RT6622014r3
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 RS6612006for troubleshooting information.
• All safety information must be followed as provided in the Service Manual.
• Refer to the appropriate Parts Catalog for part number information.
• Model numbers listed on page 3.
GMS8 33-3/8" 80% Gas Furnace Units
80% AFUE, Single Stage,
Multi-Speed, Upflow Horizontal
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Goodman GMS80403A A Series Specifications

General

Brand	Goodman
Model	GMS80403A A Series
Category	Furnace
Language	English

Summary

Goodman GMS8 Furnace Technical Manual

Product Identification

Model Number Breakdown

Explanation of the GMS8 model number coding system for part identification.

Model Number Listing

List of specific GMS8 furnace model numbers available.

Product Design

General Operation

Overview of the furnace's electronic ignition and self-diagnosing control module.

Location Considerations

Guidelines for furnace placement and installation environment.

Component Identification

Product Dimensions

Product Design

Pressure Switch Trip Points

Specifications for pressure switch settings for various models.

Limit Switch Settings

Settings for primary, rollout, and auxiliary limit switches.

Product Design

Coil Matches

Compatibility information for Amana brand coils with GMS8 furnaces.

Product Design

Thermostat Recommendations

Guidance on selecting compatible thermostats for the unit.

Filter Requirements

Specifications for required furnace filters and their installation.

Furnace Specifications

Blower Performance Specifications

Wiring Diagrams

Schematics