Goodman HVAC Furnace Manual

The Goodman HVAC Furnace is a high-efficiency gas furnace designed for residential heating applications. This unit features advanced heat exchanger technology, variable-speed blower motor, electronic ignition system, diagnostic LED indicators, multiple-speed airflow settings, and compatibility with standard thermostat systems. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Thermostat 7. Operating Procedures 8. Maintenance Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-efficiency heat exchanger, variable-speed blower motor, electronic ignition system, diagnostic LED, pressure switches, gas valve, flame sensor, and filter access panel.

Feature	Description
Heat Exchanger	Stainless steel primary and secondary heat exchangers
Blower Motor	Variable-speed ECM motor for efficient airflow
Ignition System	Hot surface igniter with flame sensor
Diagnostic LED	Flashing codes for troubleshooting
Gas Valve	Modulating gas valve for precise temperature control
Pressure Switches	Safety switches for proper venting operation
Filter Access	Easy-access filter compartment
Thermostat Connection	Standard 24V thermostat terminals
Power Switch	Integrated power disconnect switch
Vent Connections	PVC vent connections for intake and exhaust

Installation

Unpack and inspect all components. Ensure proper clearances and ventilation.

Position furnace: Place on stable, level surface with proper clearances.
Connect gas line: Use approved gas piping and fittings; pressure test required.
Connect electrical: 120V power supply with proper grounding.
Connect venting: Install PVC intake and exhaust pipes according to code.
Connect thermostat: Wire to standard 24V thermostat terminals.
Connect ductwork: Secure supply and return air ducts properly.

WARNING! Gas furnace installation must be performed by qualified HVAC technician. Follow all local codes and manufacturer specifications.

First-Time Setup

Power on furnace; follow startup sequence.

Verify gas supply: Ensure gas valve is open and pressure is correct.
Check electrical: Confirm proper voltage at unit.
Set thermostat: Program heating setpoints and schedule.
Test operation: Initiate heating cycle and verify proper operation.
Check airflow: Verify proper airflow through all registers.
Monitor operation: Observe for proper ignition and flame characteristics.

CAUTION! Initial startup must be performed by qualified technician. Verify all safety controls are functioning properly.

Specifications

Heating Capacity: 40,000 - 120,000 BTU/h (model dependent)
Efficiency: Up to 96% AFUE
Electrical: 120V AC, 60Hz, 15A circuit
Gas Type: Natural gas or LP (conversion kit required)
Blower Motor: Variable-speed ECM
Heat Exchanger: Stainless steel primary and secondary
Venting: PVC pipe (2" - 3" diameter)
Filter Size: Standard 16x25x1 or 20x25x1
Operating Temp Range: -30°F to 120°F ambient
Warranty: Limited lifetime heat exchanger warranty

Controls and Settings

Access control board via front access panel. Integrated control module with diagnostic LED.

Thermostat Controls: HEAT/COOL/OFF mode, temperature setpoint, fan AUTO/ON, system programming.

Furnace Settings: Blower speed adjustments, temperature rise verification, gas pressure settings, ignition timing. Diagnostic: LED flash codes for troubleshooting (1 flash = normal operation, multiple flashes indicate specific faults). Safety: Limit switches, pressure switches, flame rollout switches, igniter control.

Connecting Thermostat

Standard 24V thermostat connection with R, W, Y, G, C terminals.

Turn off power to furnace before wiring.
Connect thermostat wires to control board terminals.
Match wire colors to terminal designations.
Secure connections and replace access panel.
Restore power and test thermostat operation.

Tip: Use programmable thermostat for optimal energy efficiency and comfort.

Operating Procedures

Normal heating operation sequence:

Thermostat calls for heat: Sends signal to control board.
Inducer motor starts: Creates draft through heat exchanger.
Pressure switch verification: Confirms proper venting.
Igniter heats: Hot surface igniter reaches temperature.
Gas valve opens: Supplies gas to burners.
Ignition: Gas ignites and flame sensor confirms.
Blower starts: Circulates heated air through ductwork.
Cycle completion: Thermostat satisfied, system shuts down.

WARNING! Never attempt to manually override safety controls. Contact qualified technician for service.

Maintenance Features

Regular maintenance requirements: Filter replacement (monthly), annual professional inspection, blower cleaning, heat exchanger inspection, vent system check.

Care & Cleaning

Turn off power before maintenance. Replace air filters regularly. Keep area around furnace clear. Professional annual cleaning recommended.

CAUTION! Do not use compressed air to clean internal components. Keep electrical components dry.

Regulatory Information

UL certified for safety. ANSI Z21.47 standards compliance. CSA International approved. Meets DOE energy efficiency standards. For technical support, visit www.goodmanmfg.com or contact 1-877-254-4729. Installation must comply with local building codes and NFPA standards.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, safety switch	Check power supply; verify thermostat setting; reset safety switches.
No heat	Gas supply, ignition, filter	Verify gas valve open; check igniter; replace dirty filter.
Short cycling	Filter, thermostat, limit switch	Clean/replace filter; check thermostat location; verify limit switch operation.
Blower not working	Power, motor, capacitor	Check power to blower; test motor windings; check capacitor.
Unusual noises	Blower, inducer, ductwork	Clean blower wheel; check inducer motor; inspect duct connections.

Reset: Power cycle unit; check diagnostic LED codes.

Service: 1-877-254-4729; www.goodmanmfg.com