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Goodman GMEC960402BNAA User Manual

Goodman GMEC960402BNAA
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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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





Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
0140M00517-A

Table of Contents

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Goodman GMEC960402BNAA Specifications

General IconGeneral
BrandGoodman
Model NumberGMEC960402BNAA
CategoryFurnace
TypeGas
Efficiency96% AFUE
Heating Capacity40, 000 BTU/h
Input BTU/h40, 000
Output BTU/h38, 000
Fuel TypeNatural Gas
Blower MotorVariable Speed
Warranty10-year limited parts warranty

Summary

Important Information

Consumer and Servicer Notices

Key notices for users and service personnel, including safety symbols.

Hazard Warnings

Critical warnings about carbon monoxide poisoning and general hazards.

Product Identification

Model Nomenclature Explained

Guide to interpreting model and manufacturing numbers for identification.

Model Specifications Overview

List of model numbers, MFG numbers, and associated descriptions.

System Operation

Safety, Precautions, and ESD

Essential safety guidelines, warnings, and electrostatic discharge (ESD) precautions.

Installation and Location Guidelines

Furnace placement, clearance, and air distribution requirements.

Air and Gas Supply Requirements

Guidelines for combustion air, ventilation, and gas piping connections.

System Configuration and Operation Logic

DIP switch settings and system sequence of operation for heating/cooling.

Scheduled Maintenance

Annual Inspection and Component Checks

Annual furnace inspection procedures and key component checks.

Filter Maintenance and Replacement

Instructions for air filter maintenance and replacement for optimal performance.

Burner and Flame Sensor Checks

Procedures for inspecting burner flames and cleaning the flame sensor.

Heating Performance Testing

Methodology for testing furnace heating performance and airflow.

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