Goodman Amana ComfortNet GMVC8 User Manual (English)

Questions and Answers:

J
jennifergreenAug 17, 2025
Why is my Goodman Amana ComfortNet GMVC8 Furnace blower running constantly with E3 error?
- R
  Rebecca OrtegaAug 17, 2025
  If your Goodman furnace's circulator blower runs continuously, but there's no furnace operation, and the integrated control module LED display shows an E3 error code, it could be due to an open primary or auxiliary limit circuit, or an open rollout limit circuit. Check the filters and ductwork for any blockages, and clean the filters or remove any obstructions. It could also be due to insufficient conditioned air over the heat exchanger, so check the circulator blower speed and performance, correcting the speed or replacing the blower motor if needed. Misaligned burners, a blocked flue and/or air inlet pipe, or a failed induced draft blower can also cause this issue; check the burners for proper alignment.
Q
qwillisAug 21, 2025
What causes E4 error on a Goodman Amana ComfortNet GMVC8 Furnace?
- K
  Kerry FrancoAug 21, 2025
  If your Goodman furnace's induced draft blower and circulator blower run continuously, but there's no furnace operation, and the integrated control module LED display shows an E4 error code, it might be due to a flame being sensed when there's no call for heat. Correct any shorts at the flame sensor or in the flame sensor wiring. It could also be due to a lingering burner flame, so check for that. Another possibility is a slow-closing gas valve; verify that the gas valve is operating properly.
M
Misty SullivanAug 25, 2025
How to troubleshoot a Goodman Amana ComfortNet GMVC8 with no LED signal?
- B
  Brett Alexander Jr.Aug 26, 2025
  If your Goodman furnace fails to operate and the integrated control module LED display shows no signal, it could be due to a lack of 115V power to the furnace or 24V power to the integrated control module. Ensure that both 115V and 24V power are reaching the furnace and integrated control module. Also, check the integrated control module fuse (3A) and replace it if necessary. If the integrated control module has an internal fault, it will need to be replaced.
A
Aaron MillerAug 28, 2025
Why is my Goodman Amana ComfortNet GMVC8 Furnace showing E2 error?
- M
  Morgan HigginsAug 28, 2025
  If your Goodman furnace shows an E2 error code, and the induced draft blower runs continuously without further furnace operation, it could be because the low stage pressure switch circuit is not closed. Inspect the pressure switch hose and repair or replace it if necessary. It could also be due to a pressure switch hose that is blocked, pinched, or connected improperly. Inspect the flue and/or inlet air piping for blockage, proper length, elbows, and termination. A blocked flue and/or inlet air pipe, a blocked drain system, or a weak induced draft blower could also be the cause. Check the induced draft blower's performance and correct as necessary.
E
Erica BarberSep 1, 2025
How to fix Goodman Amana ComfortNet GMVC8 Furnace E6 error?
- J
  John FloresSep 1, 2025
  If your Goodman furnace is showing an E6 error code during normal operation, it indicates that the flame sense micro amp signal is low. Try sanding the flame sensor if it appears coated or oxidized. Also, inspect the flame sensor alignment to ensure it's properly positioned in the burner flame. In addition, check for lazy burner flames caused by improper gas pressure or combustion air, and compare the current gas pressure to the rating plate, adjusting as needed.
M
mgibsonSep 4, 2025
What does E1 error mean on Goodman Amana ComfortNet GMVC8 Furnace?
- M
  Michael HarveySep 5, 2025
  If your Goodman furnace fails to operate and the integrated control module LED display provides an E1 error code, it could be because the low stage pressure switch circuit is closed at the start of the heating cycle. If this is the case, replace the low stage pressure switch. Another potential cause is shorts in the pressure switch circuit wiring, which would require repairing the short in the wiring.
W
Willie Anderson Jr.Sep 9, 2025
What to do if Goodman Amana ComfortNet GMVC8 displays E5 error?
- D
  daniel61Sep 9, 2025
  If your Goodman furnace shows an E5 error code and won't operate, it indicates an open fuse. Locate and correct any shorts in the low voltage wiring.

Goodman Amana ComfortNet GMVC8 Specifications

General

Brand	Goodman
Model	Amana ComfortNet GMVC8
Category	Furnace
Language	English

Summary

IMPORTANT INFORMATION

SAFETY NOTICES

Safety warnings and guidelines for consumers and servicers, emphasizing hazard recognition.

PRODUCT IDENTIFICATION

ACCESSORIES

EXTERNAL FILTER RACK KIT

Details on the EFR01 external filter rack kit, its purpose, and installation.

OPERATING INSTRUCTIONS

SAFETY PRECAUTIONS

Essential safety guidelines to follow before and during furnace operation.

OPERATING PROCEDURE

Step-by-step instructions for safe furnace operation, including startup.

SHUTTING OFF GAS

Procedure for safely shutting off the gas supply to the appliance.

PRODUCT DESIGN

SAFETY AND APPLICATION

Details on product application and general safety warnings related to its use.

ESD PRECAUTIONS

Precautions to prevent damage from electrostatic discharge to electrical components.

LOCATION REQUIREMENTS

Guidelines for selecting an appropriate and safe location for furnace installation.

CLEARANCES AND ACCESSIBILITY

Minimum clearances to combustible materials and accessibility requirements for installation.

FURNACE SUSPENSION

Instructions and diagrams for suspending the furnace from rafters or joists.

THERMOSTAT AND DEHUMIDISTAT REQ.

Requirements for using thermostats and dehumidistats, including setup and compatibility.

THERMOSTAT/DEHUMIDISTAT LOCATION

Recommended locations for installing thermostats and dehumidistats for optimal performance.

COMBUSTION AIR REQUIREMENTS

Guidelines for providing adequate combustion and ventilation air for furnace operation.

CATEGORY I VENTING

Requirements for Category I venting, especially for 80% furnaces, and common venting.

MASONRY CHIMNEYS

Warnings and checklist for venting an 80% furnace into a masonry chimney safely.

HIGH ALTITUDE AND PROPANE GAS

Information on high altitude derating and propane gas conversion procedures.

GAS PIPING CONNECTIONS

Guidelines and requirements for safely connecting the gas piping to the furnace.

WIRING HARNESS AND CONNECTIONS

Details on the furnace's wiring harness and 115-volt line connections.

ACCESSORY WIRING

Instructions for wiring optional accessories like humidifiers and electronic air cleaners.

24 VOLT THERMOSTAT WIRING

Wiring instructions for connecting 24-volt thermostats to the furnace.

SINGLE-STAGE THERMOSTAT APP.

Guidance on applying single-stage thermostats for furnace control and operation.

CONTROL BOARD CONFIGURATION

Configuration settings for different control boards via DIP switches.

DEHUMIDISTAT WIRING & FAN OPERATION

Wiring for dehumidistats and settings for continuous fan operation.

BLOWER SPEED ADJUSTMENT

Guide for adjusting the circulator blower speed for optimal performance.

DIP SWITCH CONFIGURATIONS

Table detailing DIP switch settings for furnaces with specific control boards.

SYSTEM OPERATION

NORMAL SEQUENCE OF OPERATION

Describes power-up, heating, and cooling sequences for standard operation.

SPECIAL OPERATING MODES

Details on fan-only and dehumidification modes, plus heating troubleshooting intro.

HEATING ABNORMAL OPERATION

Introduction to common heating issues and diagnostic error codes.

COMFORTNET SYSTEM OVERVIEW

Overview of the ComfortNet system, its digital communication, and benefits.

CTK03A* OPERATIONS

Details on operating the CTK03A* thermostat for humidification and dual fuel.

COMFORTNET WIRING

Wiring diagrams for ComfortNet systems, including non-communicating AC units.

ADVANCED FEATURE NAVIGATION

Guide to accessing and navigating advanced features on ComfortNet thermostats.

ADVANCED FEATURE MENUS

Details on accessing furnace advanced features through menus like Diagnostics, Identification, and Setup.

SYSTEM STATUS AND NON-COMM CONFIGURATION

Information on system status indicators and configuration for non-communicating systems.

SYSTEM TROUBLESHOOTING

Guide to troubleshooting ComfortNet system issues using LED indicators and error codes.

ESD PRECAUTIONS AND MOTOR TROUBLESHOOTING

Safety procedures for ESD and troubleshooting ECM motors.

TROUBLESHOOTING

PCBKF103/104/105 ERRORS

Troubleshooting table for PCBKF103, PCBKF104, PCBKF105 control boards with error codes.

PCBKF101/102 ERRORS

Troubleshooting table for PCBKF101/102 control boards with error codes.

POLARIZATION AND PHASING

CHECKING TRANSFORMER PHASING

Procedure for checking transformer phasing to ensure proper electrical connection.

MAINTENANCE

ANNUAL INSPECTION AND FILTER SERVICE

Guidelines for annual furnace inspections and air filter maintenance.

FLUE, FLAME SENSOR, BURNER MAINTENANCE

Maintenance tasks for flue passages, flame sensor, and burners.

HEATING PERFORMANCE TEST

Steps to conduct a heating performance test and calculate BTU input.

SERVICING

CHECKING VOLTAGE AND WIRING

Steps to check electrical voltage and wiring continuity for troubleshooting.

THERMOSTAT AND ANTICIPATOR CHECKS

Procedures for testing thermostats and heating anticipators.

TRANSFORMER AND CONTROL CIRCUIT

How to test the step-down transformer and control circuit for proper operation.

ECM BLOWER MOTOR DIAGNOSIS

Procedures for diagnosing the ECM blower motor, including connections and operation.

ECM MOTOR GENERAL CHECKS

General checks for ECM motors, including wiring and mounting.

ULTRACHECK-EZ DIAGNOSTIC TOOL

Instructions for using the UltraCheck-EZ diagnostic tool for ECM motors.

HIGH AND LOW VOLTAGE ELECTRICAL CHECKS

Testing high and low voltage electrical circuits for proper power delivery.

MOTOR CONTROL/END BELL CHECKS

Inspecting motor control/end bell components for damage or faults.

ECM MOTOR CHECKS

Performing resistance checks on ECM motor windings and shell.

DUCT STATIC MEASUREMENT

How to measure external static pressure in the duct system for airflow assessment.

TEMPERATURE RISE MEASUREMENT

Steps to measure temperature rise across the heat exchanger for performance checks.

PRIMARY LIMIT CONTROL TEST

How to test the primary limit control for proper function and continuity.

AUXILIARY LIMIT CONTROL TEST

Procedure for testing the auxiliary limit control and its location.

FLAME ROLLOUT CONTROL TEST

How to test the flame rollout control, its symptoms, and reset procedure.

INDUCED DRAFT BLOWER MOTOR TEST

Steps to test the induced draft blower motor for continuity and operation.

GAS VALVE, BURNERS, AND ORIFICES CHECKS

Checking gas valve, main burners, and orifices for proper function.

GAS PRESSURE MEASUREMENT

How to measure inlet and manifold gas supply pressure for furnace operation.

MANIFOLD PRESSURE ADJUSTMENT

Steps for measuring and adjusting natural gas manifold pressure for optimal burner performance.

HOT SURFACE IGNITOR TEST

How to test the hot surface ignitor for resistance and proper operation.

FLASHBACK TROUBLESHOOTING

Identifying and troubleshooting flashback conditions in the burner venturi.

PRESSURE SWITCH TEST

Procedure for checking pressure switches, including testing with a manometer.

HIGH ALTITUDE APPLICATIONS

Requirements for high altitude installations, including necessary kits.

DELAYED IGNITION AND IGNITION CONTROL BOARDS

Checking for delayed ignition and testing integrated ignition control boards.

FLAME SENSOR TEST

How to test the flame sensor for proper function and continuity in proving combustion.

PRESSURE SWITCH CHART

Chart detailing pressure switch trip points and part numbers for various models.

ACCESSORY WIRING DIAGRAMS

ALL FUEL SYSTEM CONTROL BOARD WIRING

Wiring diagram for the AFE1860A All Fuel System Control Board.

INTEGRATED IGNITION CONTROL WIRING

Wiring diagram for the Integrated Ignition Control module and accessory connections.

SCHEMATICS

CONTROL ASSEMBLY SCHEMATIC

Schematic of the control assembly for specific furnace models.

TYPICAL SCHEMATIC PCBKF103

Typical schematic for furnaces with the PCBKF103 control board.

WIRING DIAGRAMS

MVC8 / DVC8 WIRING DIAGRAM

Wiring diagram for MVC8 and DVC8 models, including color codes.

Related product manuals

Goodman Amana AMES800604BUAA

28 pages

Goodman Amana AMES80 U Series

28 pages

Goodman ComfortNet ACVC9

Goodman AMVC960603BNAA

14 pages

Goodman AMVC960803BNAA

14 pages

Goodman AMVC961005CNAA

14 pages

Goodman AMVC800805CX AA

53 pages

ACVC8 CA Series AMVC8 CA Series

53 pages

Goodman Amana ComfortNet GMVC8 User Manual

Table of Contents

Questions and Answers:

Goodman Amana ComfortNet GMVC8 Specifications

Summary

IMPORTANT INFORMATION

SAFETY NOTICES

PRODUCT IDENTIFICATION

ACCESSORIES

EXTERNAL FILTER RACK KIT

OPERATING INSTRUCTIONS

SAFETY PRECAUTIONS

OPERATING PROCEDURE

SHUTTING OFF GAS

PRODUCT DESIGN

SAFETY AND APPLICATION

ESD PRECAUTIONS

LOCATION REQUIREMENTS

CLEARANCES AND ACCESSIBILITY

FURNACE SUSPENSION

THERMOSTAT AND DEHUMIDISTAT REQ.

THERMOSTAT/DEHUMIDISTAT LOCATION

COMBUSTION AIR REQUIREMENTS

CATEGORY I VENTING

MASONRY CHIMNEYS

HIGH ALTITUDE AND PROPANE GAS

GAS PIPING CONNECTIONS

WIRING HARNESS AND CONNECTIONS

ACCESSORY WIRING

24 VOLT THERMOSTAT WIRING

SINGLE-STAGE THERMOSTAT APP.

CONTROL BOARD CONFIGURATION

DEHUMIDISTAT WIRING & FAN OPERATION

BLOWER SPEED ADJUSTMENT

DIP SWITCH CONFIGURATIONS

SYSTEM OPERATION

NORMAL SEQUENCE OF OPERATION

SPECIAL OPERATING MODES

HEATING ABNORMAL OPERATION

COMFORTNET SYSTEM OVERVIEW

CTK03A* OPERATIONS

COMFORTNET WIRING

ADVANCED FEATURE NAVIGATION

ADVANCED FEATURE MENUS

SYSTEM STATUS AND NON-COMM CONFIGURATION

SYSTEM TROUBLESHOOTING

ESD PRECAUTIONS AND MOTOR TROUBLESHOOTING

TROUBLESHOOTING

PCBKF103/104/105 ERRORS

PCBKF101/102 ERRORS

POLARIZATION AND PHASING

CHECKING TRANSFORMER PHASING

MAINTENANCE

ANNUAL INSPECTION AND FILTER SERVICE

FLUE, FLAME SENSOR, BURNER MAINTENANCE

HEATING PERFORMANCE TEST

SERVICING

CHECKING VOLTAGE AND WIRING

THERMOSTAT AND ANTICIPATOR CHECKS

TRANSFORMER AND CONTROL CIRCUIT

ECM BLOWER MOTOR DIAGNOSIS

ECM MOTOR GENERAL CHECKS

ULTRACHECK-EZ DIAGNOSTIC TOOL

HIGH AND LOW VOLTAGE ELECTRICAL CHECKS

MOTOR CONTROL/END BELL CHECKS

ECM MOTOR CHECKS

DUCT STATIC MEASUREMENT

TEMPERATURE RISE MEASUREMENT

PRIMARY LIMIT CONTROL TEST

AUXILIARY LIMIT CONTROL TEST

FLAME ROLLOUT CONTROL TEST

INDUCED DRAFT BLOWER MOTOR TEST

GAS VALVE, BURNERS, AND ORIFICES CHECKS

GAS PRESSURE MEASUREMENT

MANIFOLD PRESSURE ADJUSTMENT

HOT SURFACE IGNITOR TEST

FLASHBACK TROUBLESHOOTING

PRESSURE SWITCH TEST

HIGH ALTITUDE APPLICATIONS

DELAYED IGNITION AND IGNITION CONTROL BOARDS