Goodman Manufacturing Furnace Manuals

Goodman Manufacturing furnaces are high-efficiency heating systems known for reliability and performance. These gas and electric furnaces feature advanced heat exchangers, variable-speed blowers, smart thermostat compatibility, and energy-saving technologies. Below are comprehensive sections covering installation, operation, maintenance, troubleshooting, and technical specifications for various Goodman furnace models.

1. Product Overview 2. Installation Guidelines 3. Operating Instructions 4. Technical Specifications 5. Control Panel & Settings 6. Maintenance Procedures 7. Safety Features 8. Error Codes & Diagnostics 9. Warranty Information 10. Regulatory Compliance 11. Troubleshooting Guide

Product Overview

Goodman furnaces include key components: heat exchanger, blower motor, gas valve, ignition system, control board, air filter, and venting system.

Component	Description
Heat Exchanger	Stainless steel primary and secondary heat exchangers
Blower Motor	Variable-speed ECM motor for efficient airflow
Gas Valve	Electronic modulating gas valve
Ignition System	Hot surface ignition with flame sensor
Control Board	Microprocessor-based control system
Air Filter	Standard 1-inch or 4-inch media filter
Venting System	PVC or metal vent pipes
Thermostat Connection	Compatible with most 24V thermostats
Safety Switches	Pressure switches, limit switches, rollout switches
Drain System	Condensate drain for high-efficiency models

Installation Guidelines

Professional installation recommended. Follow local codes and manufacturer specifications.

Location: Install in dry, level area with proper clearance and ventilation.
Gas Connection: Use approved gas piping; pressure test for leaks.
Electrical: Connect to dedicated 120V circuit; proper grounding required.
Venting: Install according to manufacturer specifications and local codes.
Ductwork: Ensure proper sizing and sealing for optimal performance.

WARNING! Gas furnaces must be installed by qualified technicians. Improper installation can cause fire, explosion, or carbon monoxide poisoning.

Operating Instructions

Power on furnace; set thermostat to desired temperature.

Startup: Set thermostat above room temperature; furnace should ignite within 60 seconds.
Normal Operation: Blower starts after heat exchanger warms up; runs until thermostat satisfied.
Shutdown: Set thermostat below room temperature; gas valve closes, blower continues briefly.
Fan Mode: Use thermostat to run blower without heat for air circulation.

CAUTION! Never block vents or returns. Keep combustible materials away from furnace.

Technical Specifications

Models: GMVC96, GMEC96, GMS8, GCVC96 series
Input Capacity: 40,000 to 120,000 BTU/h
Efficiency: 80% to 98% AFUE
Voltage: 120V AC, 60Hz
Gas Type: Natural gas or propane (conversion kit required)
Blower Speeds: Multiple speeds with ECM motor
Sound Level: As low as 65 dB
Warranty: Limited lifetime heat exchanger, 10-year parts
Dimensions: Varies by model (typically 21"W x 21"D x 45"H)

Control Panel & Settings

Access control board via front panel. LED status lights indicate system operation.

Control Board: LED diagnostic lights, dip switches, fuse, terminal connections.

Settings: Blower speed adjustments, temperature rise verification, gas pressure settings, timing adjustments. Diagnostic: LED flash codes for troubleshooting. Safety: Manual reset buttons for limit switches. Configuration: Dip switches for thermostat compatibility, blower delays.

Maintenance Procedures

Regular maintenance ensures efficiency and longevity.

Monthly: Check and replace air filter as needed.
Seasonal: Inspect burners, heat exchanger, vent system.
Annual: Professional inspection and cleaning recommended.
Blower: Clean blower wheel and housing annually.
Drain System: Clear condensate drain lines and trap.

Tip: Keep area around furnace clean and unobstructed.

Safety Features

Multiple safety systems protect against hazardous conditions.

Safety Feature	Function
Flame Rollout Switch	Detects flame outside combustion chamber
High Limit Switch	Prevents overheating
Pressure Switches	Verify proper venting airflow
Flame Sensor	Confirms burner ignition
Gas Valve	Automatic shutoff if ignition fails
Fuse Protection	Protects control board from electrical surges

Error Codes & Diagnostics

LED flash codes indicate specific issues for troubleshooting.

Flash Pattern	Description	Action
1 Flash	Ignition lockout	Check gas supply, ignition
2 Flashes	Pressure switch error	Check venting, switches
3 Flashes	Limit switch open	Check airflow, filter
4 Flashes	Flame rollout	Check burners, heat exchanger
5 Flashes	Gas valve error	Check wiring, valve operation

Warranty Information

Goodman furnaces come with comprehensive warranty coverage.

Heat Exchanger: Limited lifetime warranty
Parts: 10-year limited warranty
Labor: Varies by installer (typically 1 year)
Registration: Online registration required for full warranty
Transferable: Warranties transfer to new homeowners

Note: Professional installation and regular maintenance required for warranty validity.

Regulatory Compliance

Goodman furnaces comply with ANSI Z21.47, CSA 2.3 standards for gas-fired central furnaces. UL listed for electrical safety. Meets DOE energy efficiency standards. For technical support, visit www.goodmanmfg.com or contact 1-877-466-8626.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
No heat	Thermostat, power, gas	Check thermostat setting, circuit breaker, gas valve
Furnace won't start	Safety switches, filter	Reset safety switches, replace dirty filter
Short cycling	Airflow, overheating	Clean filter, check vents, verify temperature rise
Blower won't stop	Thermostat, control board	Check thermostat fan setting, control board operation
Unusual noises	Blower, burners	Inspect blower wheel, clean burners, check ductwork

Reset: Turn power off for 30 seconds, then restart.

Service: 1-877-466-8626; www.goodmanmfg.com