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Goodman GMEC960804CNAB User Manual

Goodman GMEC960804CNAB
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Service and Troubleshooting

®

®


Copyright © 2014-2020 Goodman Manufacturing Company, L.P.
RS6612013r10
June 2020
®
is a registered trademark of Maytag Corporation or its related companies and is used under license.
All rights reserved.
TABLE OF CONTENTS
IMPORTANT INFORMATION ............................................ 2
PRODUCT IDENTIFICATION ........................................... 4
SYSTEM OPERATION ...................................................... 7
SCHEDULED MAINTENANCE ....................................... 42
SERVICING ..................................................................... 46
CHECKING VOLTAGE .............................................. 47
CHECKING WIRING .................................................. 47
CHECKNG THERMOSTAT, WIRING ........................ 47
HEATING ANTICIPATOR ........................................... 47
CHECKING TRANSFORMER AND CONTROL
CIRCUIT ...................................................................... 47
CHECKING AIR CIRCULATOR BLOWER MOTOR 48
CHECKING DUCT STATIC ........................................ 48
CHECKING TEMPERATURE RISE .......................... 49
CHECKING PRIMARY LIMIT CONTROL ................. 49
CHECKING AUXILIARY LIMIT CONTROL ............... 50
CHECKING FLAME ROLLOUT CONTROL ............. 51
INDUCED DRAFT BLOWER MOTOR ...................... 52
CECKING GAS VALVE (REDUNDANT) ................... 52
CHECKING MAIN BURNERS ................................... 52
CHECKING ORIFICES .............................................. 52
CHECKING GAS PRESSURE .................................. 53
CHECKING HOT SURFACE IGNITOR ..................... 55
CHECKING FOR FLASHBACK ................................. 55
CHECKING PRESSURE SWITCH............................ 55
HIGH ALTITUDE APPLICATION ............................... 56
CHECKING FOR DELAYED IGNITION .................... 56
CHECKING INTERGRATED IGNITION CONTROL
BOARDS ..................................................................... 56
CHECKING FLAME SENSOR ................................... 57
TROUBLESHOOTING CHART ....................................... 58
WIRING DIAGRAMS ....................................................... 61
Pride and workmanship go into every product to provide
our customers with quality products. It is possible, however,
that during its lifetime a product may require service.

technician who is familiar with the safety procedures
required in the repair and who is equipped with the proper
tools, parts, testing instruments and the appropriate service
manual. 
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
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

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
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

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Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
0140M00517-A

Table of Contents

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Goodman GMEC960804CNAB Specifications

General IconGeneral
BrandGoodman
ModelGMEC960804CNAB
CategoryFurnace
LanguageEnglish

Summary

Important Information

Consumer and Servicer Notices

Provides critical notices for users and service personnel regarding safety and operation.

Safety Symbols and Warnings

Details essential safety guidelines, warnings, and precautions for furnace use and servicing.

Product Identification

Model Nomenclature Explanation

Explains the coding system for identifying furnace models and their components.

Model Number Listings

Lists specific furnace models and their corresponding manufacturer numbers for identification.

System Operation

Introduction, Safety, and Application Overview

Introduces the furnace, covers safety, ESD, product application, and general installation context.

Installation, Venting, and Fuel Handling

Details installation requirements, venting, gas/fuel handling, and propane conversion.

Control, Blower, and DIP Switch Configuration

Covers thermostat wiring, accessory connections, blower settings, and DIP switch configurations.

Operational Sequences and Combustion

Describes sequences for heating, cooling, fan modes, and factors affecting combustion quality.

Scheduled Maintenance

Annual Inspection and Filter Maintenance

Outlines annual checks for furnace components, filters, and drainage systems.

Performance Testing and Gas Metering

Details heating performance tests, clocking gas meters, and checking pressure switches.

Servicing

Electrical Checks and Troubleshooting

Covers transformer phasing, voltage, wiring, blower motor, and control circuit checks.

Ductwork and Limit Control Checks

Guides on measuring duct static, temperature rise, and testing limit and rollout controls.

Gas System and Ignition Component Checks

Details servicing of gas valves, burners, orifices, gas pressure, ignitors, and flame sensors.

Troubleshooting

Diagnostic Codes and Error Indicators

Explains LED flash codes, fault descriptions, and provides troubleshooting tables.

Lockout Conditions and Reset Procedures

Details external and internal lockout conditions and methods for resetting the furnace.

Wiring Diagrams

Furnace Electrical Schematics

Provides detailed wiring diagrams for all furnace components and connections.

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