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Goodman GMEC961004CNAC User Manual

Goodman GMEC961004CNAC
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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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







Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
0140M00517-A

Table of Contents

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Goodman GMEC961004CNAC Specifications

General IconGeneral
BrandGoodman
ModelGMEC961004CNAC
CategoryFurnace
LanguageEnglish

Summary

Important Information

General Safety Warnings and Precautions

Covers critical safety warnings including high voltage, combustible materials, and gas leaks.

Carbon Monoxide Hazard and Gas Leaks

Explains CO poisoning risks, ventilation needs, and procedures for gas leaks.

Product Identification

Model Nomenclature and Identification

Explains model number characters and lists identification details for furnace parts.

System Operation

Installation, Safety, and Application

Details furnace operation, safety precautions, product application, and dual certification.

Location, Air, and Venting Requirements

Specifies location criteria, combustion air needs, and venting system considerations.

Condensate Drainage and Propane Gas

Covers condensate management and requirements for propane gas and high altitude installations.

Scheduled Maintenance

Annual Inspection and Component Checks

Outlines essential checks for furnace components, flue pipes, burners, and drainage.

Filter Maintenance and Blower Motor

Details filter removal, installation, and inspection of blower motors.

Servicing

Voltage, Wiring, and Transformer Checks

Provides steps to check voltage, wiring continuity, and transformer operation.

Blower Motor, Duct Static, and Limits

Explains testing of blower motors, measuring duct static, and checking limit controls.

Gas Pressure and Burner System Checks

Covers procedures for checking gas valve, burners, orifices, and gas pressure.

Ignitor, Flame Sensor, and Pressure Switches

Details testing for ignitors, flame sensors, flashback, and pressure switches.

Troubleshooting

Diagnostic LED Codes and Fault Descriptions

Lists LED flash codes, their associated faults, and recommended checks for diagnosis.

Fault Retrieval and Lockout Reset

Explains how to retrieve fault codes and reset furnace lockout conditions.

Wiring Diagrams

Furnace Electrical Schematics Overview

Presents detailed wiring diagrams for the furnace and its electrical components.

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