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Goodman GMEC960402BNAB User Manual

Goodman GMEC960402BNAB
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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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







Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
0140M00517-A

Table of Contents

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Goodman GMEC960402BNAB Specifications

General IconGeneral
BrandGoodman
ModelGMEC960402BNAB
CategoryFurnace
LanguageEnglish

Summary

Important Information

Safety Warnings and Hazards

Covers consumer/servicer notices, safety symbols, and critical hazard warnings for safe operation.

Product Identification

Model Nomenclature

Explains the breakdown of model numbers for component identification and ordering.

System Operation

Installation Basics and Requirements

Covers setup, safety, location, clearances, combustion air, venting, and installation practices.

Gas and Electrical Connections

Details gas supply, piping, pressure, propane conversion, and electrical wiring for system setup.

Thermostat and Blower Configuration

Explains thermostat wiring, DIP switch settings, and blower speed adjustments for optimal performance.

Scheduled Maintenance

Routine Inspections and Filter Maintenance

Covers annual checks, filter upkeep, blower motor inspection, and burner system checks.

Performance Testing Procedures

Details heating performance tests, gas meter clocking, and pressure measurement procedures.

Servicing

Electrical Checks and Phasing

Covers checking incoming power polarization, transformer phasing, and voltage measurements.

Component Testing and Diagnosis

Guides for testing electrical, gas, and safety components for identifying and resolving faults.

Troubleshooting Fault Codes

Provides a guide to LED flash codes and error conditions for furnace diagnostics.

Wiring Diagrams

Component and System Wiring Schematics

Includes detailed wiring diagrams for furnace components, control modules, and system connections.

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