Goodman Furnace Manual GMV95

The Goodman GMV95 is a high-efficiency gas furnace with variable-speed ECM blower motor, two-stage gas valve operation, AFUE rating up to 95%, direct vent system, durable aluminized steel heat exchanger, diagnostic LED system, integrated control board, and compatibility with various thermostat systems. 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 Thermostat 7. Operation Modes 8. Maintenance Schedule 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Variable-speed ECM blower, two-stage gas valve, aluminized steel heat exchanger, diagnostic LED, integrated control board, direct vent system.

Feature	Description
Variable-speed ECM blower	Energy-efficient motor with variable airflow control
Two-stage gas valve	Provides high and low fire operation for efficiency
Aluminized steel heat exchanger	Durable corrosion-resistant primary and secondary heat exchangers
Diagnostic LED	Flashing light indicates system status and error codes
Integrated control board	Manages furnace operation and safety controls
Direct vent system	Sealed combustion with PVC pipe venting
Gas valve	Controls natural gas or propane flow to burners
Pressure switches	Safety devices ensuring proper venting operation
Flame sensor	Detects burner flame for safe operation
Ignition system	Hot surface igniter for reliable lighting

Installation

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

Position furnace: Place on stable, level surface with proper clearances (minimum 1 inch from combustible materials).
Vent system installation: Install PVC vent pipes according to local codes and manufacturer specifications.
Gas connection: Use approved pipe compound on male threads; pressure test for leaks.
Electrical connection: Connect 120V power supply and thermostat wiring.
Ductwork connection: Secure supply and return air ducts properly.

WARNING! Installation must be performed by qualified HVAC technician. Gas furnaces can produce carbon monoxide - ensure proper venting.

First-Time Setup

Power on furnace; follow startup procedure.

System checkout: Verify all connections are secure and proper.
Gas pressure adjustment: Set manifold pressure to specifications (3.5" WC natural gas).
Airflow configuration: Set blower speeds for heating and cooling modes.
Thermostat configuration: Program for two-stage operation and fan control.
Test operation: Run through complete heating cycle to verify proper function.

CAUTION! Never bypass safety controls. Always verify proper venting before operation.

Specifications

Model: GMV95 Series
AFUE Rating: Up to 95%
Input BTU/H: 40,000 - 120,000 (varies by model)
Stages: Two-stage heating operation
Blower Motor: Variable-speed ECM
Venting: Direct vent (PVC) system
Gas Type: Natural gas or propane (conversion kit required)
Electrical: 120V, 60Hz
Sound Rating: Ultra-quiet operation
Warranty: Limited lifetime heat exchanger warranty

Controls and Settings

Access control board via front panel. Integrated control board manages all furnace operations.

Thermostat Connections: R, C, W, W2, G, Y, Y2 for complete system control.

Heating Stages: First stage (low fire) for mild weather, second stage (high fire) for extreme cold. Blower Control: Variable-speed operation with multiple airflow settings. Diagnostic LED: Flashing codes indicate system status (1 flash = normal operation, 2 flashes = pressure switch error, etc.). DIP Switch Settings: Configure blower speeds, timing delays, and staging parameters.

Connecting Thermostat

Compatible with most 24V thermostats including programmable and smart thermostats.

Turn off power to furnace before wiring.
Connect thermostat wires to control board terminals: R (24V), C (common), W/W1 (heat stage 1), W2 (heat stage 2), G (fan), Y/Y1 (cool stage 1), Y2 (cool stage 2).
Configure thermostat for two-stage heating operation.
Restore power and test system operation.

Tip: Use thermostat compatible with two-stage systems for optimal efficiency and comfort.

Operation Modes

Two-stage heating operation with variable-speed blower.

First Stage Operation: Low fire for mild conditions, quieter operation, higher efficiency.
Second Stage Operation: High fire for extreme cold, maximum heat output.
Fan Operation: Continuous fan mode available for air circulation.
Safety Modes: Automatic shutdown if safety controls detect issues.
Diagnostic Mode: LED flashes indicate system status and error codes.

WARNING! Never operate furnace with access panels removed. Keep combustion air intake clear of obstructions.

Maintenance Schedule

Annual professional maintenance recommended. Monthly filter inspection/replacement.

Care & Cleaning

Turn off power before servicing. Replace air filters regularly. Keep area around furnace clean and unobstructed.

CAUTION! Do not attempt to clean heat exchanger or burners - leave to qualified technician. Keep flammable materials away from furnace.

Regulatory Information

ANSI Z21.47: Certified for safe operation. UL listed. Complies with U.S. Department of Energy efficiency standards. Manufactured to meet or exceed industry standards for safety and performance. For 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	Check circuit breaker; verify thermostat settings; ensure door switch engaged.
No heat	Gas supply/ignition	Verify gas valve on; check for ignition attempts; inspect flame sensor.
Short cycling	Filter/airflow	Replace dirty air filter; check for blocked vents; verify proper airflow.
Blower not running	Motor/control	Check blower door switch; verify control board operation; inspect motor.
Error codes flashing	System fault	Count LED flashes and refer to diagnostic chart in manual.

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

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