Goodman Furnace Owner Manual

The Goodman Furnace is a high-efficiency gas furnace designed for residential heating applications. This unit features advanced combustion technology, multiple safety systems, variable-speed blower motor, electronic ignition, and compatibility with standard thermostat controls. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Heat exchanger, burners, blower assembly, gas valve, pressure switches, limit switches, igniter, flame sensor.

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

1. Location: Install in dry, clean area with proper clearance and ventilation.
2. Gas Connection: Use approved gas piping materials; pressure test required.
3. Electrical: 120V AC power supply with proper grounding.
4. Venting: Use approved PVC or metal venting materials per code.
5. Ductwork: Properly sized and sealed duct system required.

WARNING! Gas furnaces produce carbon monoxide. Proper installation and venting are critical for safety. Installation must be performed by qualified technician.

First-Time Setup

Initial startup must be performed by qualified technician.

1. Verify installation: Check all connections, clearances, and venting.
2. Gas pressure: Set manifold pressure to specifications on rating plate.
3. Electrical: Connect thermostat and verify proper wiring.
4. Startup sequence: Follow manufacturer's startup procedure.
5. System check: Verify proper operation of all safety controls.

CAUTION! Do not attempt initial startup without proper training and equipment. Carbon monoxide poisoning hazard exists if improperly installed.

Specifications

• Input Capacity: 40,000 - 120,000 BTU/h (model dependent)
• Efficiency: 80% - 96% AFUE (model dependent)
• Gas Type: Natural Gas or LP (conversion kit required)
• Electrical: 120V AC, 60Hz, 15 amp circuit
• Blower Motor: Variable-speed ECM
• Venting: Category IV (PVC) or Category I (metal) depending on model
• Filter Size: Standard 1" or 4" media filters
• Warranty: Limited lifetime heat exchanger warranty
• Sound Level: As low as 65 dB on high-efficiency models

Controls and Settings

Integrated control board with LED status lights. Access panel safety switch.

Thermostat: Compatible with most 24V thermostats. Recommended: Programmable or smart thermostat for optimal efficiency.

Control Board Lights: Green - normal operation; Red - error code (refer to manual). Blower Speeds: Adjustable for heating and continuous fan operation. Gas Valve: Electronic modulation for precise temperature control. Limit Switches: Automatic high-temperature cut-off. Pressure Switches: Verify proper venting operation.

Connecting Thermostat

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

1. Turn off power to furnace at electrical disconnect.
2. Remove thermostat cover and connect wires per wiring diagram.
3. Match thermostat terminals to furnace control board terminals.
4. Common wire (C) required for smart thermostats.
5. Restore power and verify proper operation.

Tip: Use color-coded thermostat wire for easy identification. Always turn off power before making electrical connections.

Operating Instructions

Normal operation controlled by thermostat settings.

1. Set thermostat to desired temperature and HEAT mode.
2. Furnace will initiate startup sequence: inducer motor, pressure switch verification, igniter warm-up, gas valve opening.
3. Burner ignition verified by flame sensor.
4. Blower motor starts after warm-up period.
5. Shutdown sequence reverses startup process when thermostat satisfied.
6. Continuous fan operation available at thermostat.

WARNING! Never block air vents or returns. Maintain proper airflow for safe operation. Install carbon monoxide detectors in living areas.

Safety Features

Multiple safety systems: Flame rollout switches, high limit switches, pressure switches, flame sensor, igniter control, gas valve safety shutoff.

Maintenance & Cleaning

Annual professional maintenance recommended. Monthly filter changes during heating season.

1. Filter replacement: Turn off power, remove old filter, insert new filter with arrow pointing toward blower.
2. Visual inspection: Check for debris, corrosion, or damage.
3. Professional service: Annual cleaning of burners, heat exchanger, and flue passages.
4. Duct cleaning: As needed for indoor air quality.

CAUTION! Always turn off electrical power and gas supply before performing maintenance. Only qualified technicians should service gas components.

Regulatory Information

ANSI Z21.47: Certified for natural gas and propane operation. UL listed. Meets DOE efficiency standards. Manufactured to comply with U.S. safety and performance standards. For technical support, visit www.goodmanmfg.com or contact 1-877-466-8626. Keep this manual for future reference.

Troubleshooting

Reset: Turn power off for 30 seconds, then restore. If problem persists, call for service.

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