Goodman Furnace Owner Manual GMSS960603BN

The Goodman GMSS960603BN is a high-efficiency gas furnace with 96% AFUE rating, multi-speed ECM blower motor, two-stage gas valve operation, durable aluminized steel heat exchanger, diagnostic LED system, direct spark ignition, and compatibility with various thermostat systems. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

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

Features at a Glance

Key components: Aluminized steel primary heat exchanger, stainless steel secondary heat exchanger, multi-speed ECM blower motor, two-stage gas valve, diagnostic LED, pressure switches, and flame sensor.

Feature	Description
Heat Exchanger	Aluminized steel primary with stainless steel secondary
AFUE Rating	96% Annual Fuel Utilization Efficiency
Blower Motor	Multi-speed ECM for variable airflow
Gas Valve	Two-stage operation for efficiency
Ignition System	Direct spark ignition
Diagnostic System	LED status light for error codes
Pressure Switches	Ensures proper venting operation
Flame Sensor	Monitors burner operation
Venting	PVC pipe compatible
Thermostat Compatibility	Works with single-stage and two-stage thermostats

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

Location: Install in dry, clean area with proper clearances and combustion air.
Gas connection: Use black iron pipe; test for leaks with soap solution.
Electrical: 120V AC power supply with proper grounding.
Venting: Use approved PVC pipe for intake and exhaust.
Drain line: Install condensate drain with proper trap.

WARNING! Gas furnace installation must be performed by qualified technician. Improper installation can cause fire, explosion, or carbon monoxide poisoning.

First-Time Setup

Initial startup must be performed by qualified technician.

Verify all connections: Gas, electrical, venting, and drain.
Check gas pressure: Adjust manifold pressure per specifications.
Set blower speeds: Configure for proper airflow.
Test operation: Verify ignition sequence and safety controls.
Program thermostat: Set up for two-stage operation if compatible.

CAUTION! Do not attempt first-time startup without proper training and equipment.

Specifications

Model: GMSS960603BN
Input BTU/H: 60,000
Output BTU/H: 57,600
AFUE: 96%
Stages: 2-stage heating
Blower Type: Multi-speed ECM
Motor HP: 1/3 HP
Gas Type: Natural gas
Manifold Pressure: 3.5" WC
Electrical: 120V, 60Hz
Dimensions: 21" W x 21" D x 40" H

Controls and Settings

Integrated control board with diagnostic LED. Access door switch for safety.

Control Board: LED status light (steady = normal, blinking = fault code), dip switches for configuration.

Blower Speeds: Configurable for heating and cooling applications. Gas Valve: Two-stage operation (low and high fire). Limit Switches: High temperature protection. Pressure Switches: Verify proper venting operation. Flame Sensor: Monitors burner flame.

Connecting Thermostat

Compatible with single-stage and two-stage thermostats.

Turn off power to furnace at disconnect switch.
Remove furnace access panel.
Connect thermostat wires to control board terminals (R, W, W2, G, C, Y).
For two-stage operation: Connect W2 terminal.
Restore power and test operation.

Tip: Use 18-gauge thermostat wire for best performance.

Operating Procedures

Normal operation is automatic via thermostat control.

Set thermostat to desired temperature.
Furnace will initiate call for heat sequence.
Inducer motor starts first to establish draft.
Pressure switches verify proper venting.
Ignition system activates and gas valve opens.
Flame sensor confirms ignition.
Blower motor starts after heat exchanger warm-up.
Two-stage operation modulates between low and high fire.

WARNING! Never block air vents or returns. Ensure proper airflow for safe operation.

Maintenance Schedule

Annual professional maintenance recommended.

Monthly: Check air filter, replace if dirty. Annual: Professional inspection of heat exchanger, burners, vent system, safety controls, and electrical components.

Care & Cleaning

Turn off power before any maintenance. Replace air filter monthly during heating season. Keep area around furnace clean and unobstructed.

CAUTION! Do not attempt to clean heat exchanger or burners. This requires professional service.

Regulatory Information

UL listed and ANSI certified. Complies with U.S. Department of Energy efficiency standards. Manufactured to meet or exceed industry standards for safety and performance. For technical support, contact Goodman Manufacturing at 1-877-466-8626 or visit www.goodmanmfg.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, door switch	Check power supply; verify thermostat setting; ensure door closed properly.
Blinking LED light	Fault condition	Count flashes and refer to fault code chart in manual.
No heat	Gas supply, ignition	Check gas valve; verify pilot/ignition; check flame sensor.
Short cycling	Airflow, filter	Replace dirty air filter; check for blocked vents.
Blower not running	Motor, capacitor, control	Check blower motor operation; verify control board signals.

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

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