Goodman GMEC960302BNAB - User Manual

Service and Troubleshooting
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
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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
Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
0140M00517-A

Summary

Important Information

Recognize Safety Symbols, Words and Labels

Guidance on recognizing safety symbols, words, and labels in the manual.

Carbon Monoxide Poisoning Hazard

Details on the hazard of carbon monoxide poisoning and safety precautions.

Product Identification

Nomenclature

Explains the model and manufacturing number for component identification.

System Operation

Safety

Adherence to warnings and cautions for installation, adjustment, servicing, or operation.

Combustion and Ventilation Air Requirements

Information on providing adequate combustion and ventilation air for furnace operation.

Sequence of Operation

Step-by-step description of the furnace's operational sequence.

Scheduled Maintenance

Annual Inspection

Annual checks for furnace components to ensure proper working order and system function.

Air Filter

Importance of air filters and procedures for their removal and replacement.

Clocking a Gas Meter

Procedure for measuring gas input to verify furnace operation and BTU output.

Servicing

Checking Voltage

Procedure for testing incoming and internal electrical voltages for proper operation.

Checking Gas Pressure

Steps for measuring and adjusting gas supply and manifold pressures.

Checking Pressure Switch

Verifying the function of pressure switches for safe combustion cycle initiation.

Troubleshooting

Diagnostic Chart

Reference for identifying unit operational problems based on LED flash codes.

Goodman GMEC960302BNAB Specifications