Table of Contents
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Service Instructions
®
®
Goodman
& Amana
Brand
33 3/8" 80% Modified Two Stage Gas Furnaces
AMH8, GMH8, GDH8, ADSH8
& Accessories
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 or services performed by an unqualified
person.The material in this manual does not supercede manufacturer's installation and operation instructions.
RS6612007r1
October 2013
®
is a registered trademark of Maytag Corporation or its related companies and is used under license.
®
All rights reserved.
Copyright ©
2006-2013 Goodman Manufacturing Company, L.P.
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Chapters
Table of Contents
Related Manuals for Goodman GMH8 Series
Summarization of Contents
IMPORTANT INFORMATION
IMPORTANT NOTICES FOR CONSUMERS AND SERVICERS
Key safety warnings and advice for users and service personnel.
PRODUCT IDENTIFICATION
Goodman Furnace Nomenclature
Explains the model number structure for Goodman furnaces.
Amana Furnace Nomenclature
Explains the model number structure for Amana furnaces.
ACCESSORIES
Goodman Brand "H" Model Furnace Accessories
Lists available accessories for Goodman "H" model furnaces.
Amana Brand "H" Model Furnace Accessories
Lists available accessories for Amana "H" model furnaces.
External Filter Rack Kit (EFR01)
Details the EFR01 external filter rack kit installation.
ACCESSORY WIRING DIAGRAMS
All Fuel System Control Board - AFE18-60A Wiring
Wiring diagram for the AFE18-60A control board.
Furnace Twinning Kit - FTK04 Wiring
Wiring diagram for the FTK04 furnace twinning kit.
OPERATING INSTRUCTIONS
Safety: Read Before Operating
Crucial safety precautions before initial furnace operation.
Service Instructions
Step-by-step guide for operating the furnace.
Turn Off Gas to Appliance
Procedure for safely shutting off gas supply to the furnace.
PRODUCT DESIGN
Safety Precautions & Product Application
Warnings, cautions, and intended use of the furnace.
Charge (ESD) Precautions
Guidelines for preventing electrostatic discharge damage.
Installation Location & Requirements
Factors for selecting an appropriate furnace installation location.
Combustion, Ventilation & Venting
Requirements for air supply, combustion, ventilation, and venting systems.
Gas & Electrical Systems
Details on propane conversion, high altitude, gas piping, and electrical connections.
Filters, Operation Modes & Thermostats
Filter requirements, operating sequences, and thermostat configuration.
TwinComfort™ System Configuration
How to configure and operate the TwinComfort™ system.
SYSTEM OPERATION
Heating - Abnormal Operation
Identifies and explains common heating operational faults.
MAINTENANCE
Annual Inspection & Air Filter
Procedures for annual furnace inspection and air filter service.
Filter Removal Procedures
Steps for removing different types of furnace filters.
Flame Sensor & Burners Maintenance
Guidelines for cleaning the flame sensor and checking burner flames.
Heating Performance Test
How to conduct a heating performance test and calculate BTU input.
SERVICING
Service Numbers Reference
A reference list of service procedures and their corresponding numbers.
Electrical System Checks
Procedures for checking voltage, wiring, transformer, and capacitor.
Blower, Duct, & Temperature Checks
Testing blower motors, measuring duct static, and checking temperature rise.
Limit Controls & Gas Valve Checks
Procedures for testing limit controls, induced draft blower, and gas valve.
Burner, Orifice, & Gas Pressure Checks
Inspecting burners, checking orifices, and measuring gas pressure.
Ignitor, Flashback, Pressure Switch & Altitude Checks
Testing ignitors, flashback, pressure switches, and high altitude adjustments.
Flame Sensor & Control Board Checks
Procedures for testing the flame sensor and diagnosing control board issues.
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