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Service and Troubleshooting
GMES80, AMES80, GCES80, ACES80, VMES80, VCES80 & Accessories
This manual is to be used by qualified, professionally
trained HVAC technicians only. Goodman does not assume
any responsibility for property damage or personal injury
due to improper service procedures or services performed
by an unqualified person.
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.
Products should be serviced only by a qualified 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. REVIEW ALL SERVICE INFORMATION IN THE
APPROPRIATE SERVICE MANUAL BEFORE
BEGINNING REPAIRS.
Only personnel that have been trained to install, adjust, service or
repair(hereinafter, "service") the equipment specified in this manual
should service the equipment. The manufacturer will not be
responsible for any injury or property damage arising from improper
service or service procedures. If you service this unit, you assume
responsibility for any injury or property damage which may result. In
addition, in jurisdictions that require one or more licenses to service
the equipment specified in this manual, only licensed personnel should
servise the equipment.
Improper installation, adjustment, servicing or repair of the equipment
specified in this manual, or attempting to install, adjust, service or
repair the equipment specified in this manual without proper training
may result in product damage, property damage, personal injury or
death.
PROP 65 WARNING
FOR CALIFORNIA CONSUMERS
Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
80% Single Stage Gas Furnaces
WARNING
WARNING
Copyright ©
2019-2020 Goodman Manufacturing Company, L.P.
is a registered trademark of Maytag Corporation or its related companies and is used under license.
®
IMPORTANT INFORMATION ............................................ 2
PRODUCT IDENTIFICATION ........................................... 4
SYSTEM OPERATION ...................................................... 6
SCHEDULED MAINTENANCE ....................................... 25
SERVICING ..................................................................... 27
ACESSORIES ................................................................. 45
TROUBLESHOOTING CHART ....................................... 48
WIRING DIAGRAMS ....................................................... 51
0140M00517-A
All rights reserved.
TABLE OF CONTENTS
RS6621003r3
April 2020
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Table of Contents
Related Manuals for Goodman GCES80 Series
Summarization of Contents
Important Information and Safety Warnings
Consumer and Servicer Notices
Important notices for consumers and servicers, including safety symbols.
Carbon Monoxide Hazard
Warning about the dangers of carbon monoxide poisoning.
Product Identification and Nomenclature
Furnace Nomenclature
Explains the model number structure for identifying furnace parts.
System Operation
Normal Operation Sequences
Describes standard sequences for power up, heating, cooling, and fan-only modes.
Heating Abnormal Operation
Lists probable causes and troubleshooting steps for abnormal heating.
Safety and Product Application
Covers general safety warnings, ESD precautions, and intended product applications.
Location and Clearances
Guidelines for selecting furnace location and required clearances.
Furnace Suspension and Removal
Procedures for suspending furnaces and removing existing units.
Thermostat and Combustion Air
Requirements for thermostats and combustion air supply.
Venting and Air Requirements
Details on Category I venting, louvers, grilles, screens, and air requirements.
Masonry Chimneys
Guidelines and warnings for venting into masonry chimneys.
Chimney Termination Checklist
Checklist for proper chimney termination requirements.
Chimney Condition Checks
Details checks for chimney crown, liner, and dilution air.
Chimney Venting Fixes
Explains fixes for liner termination, venting arrangements, crown rebuild, and relining.
Installation Considerations
Covers horizontal applications, alternate connections, propane/high altitude, and gas supply.
Gas Conversion and Piping
Details propane conversion, gas valve, and gas piping connections.
Electrical Connections and Wiring
Covers electrical connections, wiring harness, and 115V line connections.
Accessory and Thermostat Wiring
Wiring for accessories (humidifier, EAC) and thermostat connections.
Fan Operation and Airflow
Continuous fan, blower speed, filters, and ductwork airflow information.
Scheduled Maintenance
Filter Maintenance and Removal
Procedures for filter maintenance, removal, and replacement.
Component Checks and Servicing
Maintenance for blowers, flame sensors, burners, and tests for equipment.
Burner Inspection and Testing
Guidance on inspecting burners, test equipment, and performing heating performance tests.
Servicing Procedures
Voltage and Wiring Checks
Procedures for checking voltage and wiring integrity.
Thermostat and Control Checks
Checking thermostats, wiring, anticipators, transformers, and control circuits.
Blower Motor and Duct Static Checks
Procedures for checking blower motor and measuring duct static pressure.
Temperature Rise and Limit Controls
Checking temperature rise and primary limit controls.
Auxiliary Limit and Rollout Control
Checking auxiliary limit and flame rollout controls.
Induced Draft Blower and Gas Valve
Procedures for checking induced draft blower motor and gas valve operation.
Burner and Orifice Checks
Inspecting main burners and checking gas orifices for proper function.
Gas Pressure Measurement
Procedures for measuring inlet gas supply pressure.
Gas Manifold Pressure Adjustment
Measuring and adjusting gas manifold pressure for correct operation.
Ignitor and Flashback Checks
Procedures for checking hot surface ignitors and diagnosing flashback issues.
Switch, Altitude, and Ignition Checks
Checking pressure switches, high altitude applications, and delayed ignition.
Ignition Control Board Checks
Procedures for diagnosing and testing integrated ignition control boards.
Flame Sensor Checks
Procedures for checking and cleaning the flame sensor.
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