manual for goodman furnace gmvm96

The Goodman GMVM96 is a high-efficiency variable-speed gas furnace with modulating heating capabilities, featuring advanced ECM motor technology, up to 96% AFUE rating, two-stage gas valve operation, diagnostic LED indicators, integrated blower control, and compatibility with various thermostat systems. Designed for residential heating applications with natural gas or propane options. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

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

Features at a Glance

Key components: Variable-speed ECM blower motor, two-stage gas valve, hot surface ignitor, flame sensor, pressure switches, diagnostic LED, control board.

Feature	Description
Variable-speed ECM motor	Provides precise airflow control and energy efficiency
Two-stage gas valve	Offers high and low fire operation for comfort
Diagnostic LED	Displays error codes for troubleshooting
Hot surface ignitor	Reliable electronic ignition system
Flame sensor	Monitors burner operation for safety
Pressure switches	Ensures proper venting operation
Control board	Manages all furnace operations
Gas valve	Regulates natural gas or propane flow
Blower compartment	Houses circulating air fan
Heat exchanger	Stainless steel primary and secondary

Installation

Unpack and inspect contents. Ensure proper location with adequate clearance.

Position furnace: Install on level surface in approved location with proper clearances.
Connect gas supply: Use approved black iron pipe with sediment trap.
Connect electrical: 120V AC power supply with proper grounding.
Connect thermostat: Use 18-gauge thermostat wire.
Connect venting: Use approved PVC pipe for intake and exhaust.
Connect ductwork: Ensure proper airflow and sealing.

WARNING! Gas appliances require professional installation. Follow all local codes and manufacturer instructions.

First-Time Setup

Power on furnace; follow startup sequence.

Verify gas supply: Ensure gas valve is open and lines are purged.
Check electrical: Confirm proper voltage and grounding.
Set thermostat: Configure for two-stage operation if compatible.
Test operation: Initiate heating cycle and observe operation.
Check airflow: Verify proper CFM settings for application.
Monitor diagnostics: Observe LED for normal operation codes.

CAUTION! Only qualified technicians should perform initial setup and testing.

Specifications

Model: GMVM96 series
AFUE Rating: Up to 96%
Stages: Two-stage heating operation
Motor Type: Variable-speed ECM
Gas Type: Natural gas or propane
Input BTU: 40,000 to 120,000 BTU/hr
Voltage: 120V AC, 60Hz
Venting: PVC pipe required
Warranty: Limited lifetime heat exchanger
Sound Level: Ultra-quiet operation

Controls and Settings

Access control board via front panel. LED indicator displays status codes.

Thermostat: Compatible with single-stage, two-stage, and communicating thermostats.

Blower Settings: Adjustable airflow for different applications. Gas Valve: High and low fire settings. Diagnostic Codes: LED flashes indicate specific error conditions. DIP Switches: Configurable for various installation parameters. Pressure Switches: Monitor venting system pressure.

Connecting Components

Gas supply: Black iron pipe with drip leg. Electrical: 120V AC with disconnect. Thermostat: Standard 5-wire connection. Venting: PVC intake and exhaust.

Turn off power and gas before making connections.
Follow local codes for all gas and electrical work.
Use proper pipe sealant for gas connections.
Ensure vent pipes are properly sloped and supported.

Tip: Always use two wrenches when making gas connections to prevent damage.

Operating Procedures

Normal heating cycle operation and sequence.

Call for heat: Thermostat initiates heating cycle.
Inducer operation: Draft inducer motor starts first.
Pressure verification: Pressure switches confirm proper venting.
Ignition sequence: Hot surface ignitor heats up.
Gas valve opens: Gas flows to burners.
Flame detection: Flame sensor confirms ignition.
Blower operation: ECM blower starts after heat exchanger warms.
Modulation: Furnace adjusts firing rate for efficiency.

WARNING! Never operate furnace with access panels removed.

Maintenance Features

Self-diagnostics: LED error codes for troubleshooting. Airflow monitoring: ECM motor maintains consistent airflow. Safety controls: Multiple safety devices protect operation.

Care & Cleaning

Turn off power before servicing. Annual professional maintenance recommended.

CAUTION! Do not attempt internal cleaning without proper training. Keep combustion area clear of debris.

Regulatory Information

ANSI Z21.47: Certified for safe operation. Energy Star: May qualify for energy efficiency programs. UL listed: Meets electrical safety standards. For support, visit www.goodmanmfg.com or contact 1-877-466-8626. Installation must comply with local building codes and utility requirements.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power/thermostat	Check circuit breaker; verify thermostat settings; ensure door switches engaged.
No heat	Gas supply/ignition	Verify gas valve open; check for ignition lockout; observe LED error codes.
Short cycling	Airflow/filter	Replace dirty filter; check for blocked vents; verify proper airflow.
Blower not working	Motor/control	Check blower door switch; verify motor operation; inspect control board.
Error codes flashing	System fault	Refer to diagnostic chart in manual; count LED flashes for specific code.

Reset: Power cycle furnace to clear temporary faults.

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