Goodman Gas Furnace Owners Manual

The Goodman Gas Furnace is a high-efficiency heating system designed for residential use, featuring advanced combustion technology, multiple safety controls, energy-efficient operation, and durable construction. This manual covers installation, operation, maintenance, troubleshooting, and safety information for proper use and care of your Goodman gas furnace.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Venting and Airflow 7. Operating Instructions 8. Maintenance Schedule 9. Safety Features 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Heat exchanger, burners, blower motor, gas valve, ignition system, safety controls, thermostat connection, venting system.

FeatureDescription
Heat ExchangerStainless steel construction for durability and efficiency
Burner SystemMulti-port inshot burners for even heat distribution
Blower MotorVariable speed ECM motor for quiet operation
Gas ValvePrecise gas flow control with safety shutoff
Ignition SystemHot surface ignition for reliable startup
Safety ControlsLimit switches, pressure switches, flame sensor
Thermostat ConnectionStandard 24V connection for compatibility
Venting SystemPVC pipe compatible for sidewall or roof venting
Air FilterStandard 1-inch or 4-inch media filter slot
Diagnostic LEDBlink code system for troubleshooting

Installation Requirements

Professional installation required. Ensure proper location and clearances.

  1. Location: Install in well-ventilated area with proper clearances to combustibles.
  2. Gas Connection: Use approved gas pipe and fittings; pressure test required.
  3. Electrical: 120V AC power supply with proper grounding.
  4. Venting: Follow manufacturer specifications for vent pipe size and length.
  5. Drain Line: Proper condensate drainage system required.

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

First-Time Setup

Initial startup and commissioning by qualified technician.

  1. System Check: Verify all connections and clearances before power on.
  2. Gas Pressure: Set manifold pressure according to rating plate.
  3. Combustion Analysis: Verify proper combustion and efficiency.
  4. Airflow: Set blower speeds for proper CFM delivery.
  5. Thermostat: Program heating schedule and temperature settings.

CAUTION! Never attempt to adjust gas pressure or combustion settings without proper training and equipment.

Specifications

Controls and Settings

Integrated control board with diagnostic capabilities. Access via control panel cover removal.

Control Board: LED status light, dip switches, terminal connections for thermostat, pressure switches, limit controls.

Operating Modes: HEAT, OFF, FAN ON. Blower Settings: Heating speed, continuous fan speed. Temperature Control: Via thermostat with heating anticipator. Safety Controls: Automatic shutdown on fault conditions with diagnostic codes.

Venting and Airflow

Category IV venting system with induced draft blower. Proper airflow critical for operation.

  1. Vent Pipe: Use only approved PVC/CPVC pipe; maintain proper slope.
  2. Air Intake: Separate intake pipe or direct vent configuration.
  3. Clearances: Maintain required clearances to windows, doors, and air intakes.
  4. Air Filter: Replace regularly; check monthly during heating season.
  5. Ductwork: Ensure proper sizing and sealing for optimal performance.

Tip: Keep vent terminals clear of snow, ice, and debris for proper operation.

Operating Instructions

Normal operation controlled by thermostat.

  1. Startup: Thermostat calls for heat, control board initiates sequence.
  2. Pre-purge: Inducer motor runs to clear combustion chamber.
  3. Ignition: Hot surface igniter glows, gas valve opens.
  4. Flame Detection: Flame sensor confirms ignition.
  5. Blower Operation: Blower starts after heat exchanger warm-up delay.
  6. Shutdown: Thermostat satisfied, gas valve closes, blower continues cool-down.

WARNING! Never block return or supply air registers. Ensure adequate combustion air.

Maintenance Schedule

Regular maintenance ensures efficiency and safety.

FrequencyMaintenance Task
MonthlyCheck/replace air filter; inspect vent termination
AnnuallyProfessional inspection and cleaning
AnnuallyCheck heat exchanger for cracks or damage
AnnuallyClean burners and combustion chamber
AnnuallyCheck gas pressure and combustion analysis
AnnuallyInspect blower motor and clean if needed
AnnuallyCheck safety controls and limit switches

Safety Features

Multiple safety systems protect against hazardous conditions.

CAUTION! Install carbon monoxide detectors in sleeping areas and near furnace.

Regulatory Information

ANSI Z21.47: Certified for safety standards. UL listed. Meets DOE efficiency requirements. Manufactured to comply with U.S. safety and performance standards. For technical support, contact Goodman Manufacturing at 1-877-466-8626 or visit www.goodmanmfg.com. Serial number and model number located on rating plate.

Troubleshooting

SymptomPossible CauseCorrective Action
Furnace won't startPower, thermostat, safety lockoutCheck circuit breaker; verify thermostat setting; check diagnostic LED.
No heatGas supply, ignition failureCheck gas valve; verify pilot/igniter; check flame sensor.
Short cyclingDirty filter, airflow restrictionReplace air filter; check for blocked vents/registers.
Blower won't stopThermostat fan settingCheck thermostat fan setting (AUTO/ON); blower relay stuck.
Unusual noisesLoose parts, airflow issuesInspect blower wheel; check ductwork; clean burners.
Lockout conditionSafety device trippedReset power; check diagnostic code; call for service if recurring.

Reset: Turn power off for 30 seconds, then restore to reset control board.

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

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