45 Wiring Diagram Goodman Air Handler

Goodman Awuf Air Handler Wiring Diagram Wiring Diagram
Goodman Awuf Air Handler Wiring Diagram Wiring Diagram from wiringdiagram.2bitboer.com


Welcome to our comprehensive guide on wiring diagrams for Goodman air handlers. Whether you are an HVAC technician, a homeowner, or simply someone interested in learning about air handler wiring, this article is for you. In this guide, we will walk you through the basics of wiring a Goodman air handler, including the different components, their functions, and how to properly connect them. So let's dive in and explore the world of Goodman air handler wiring!

Understanding the Basics

The Role of the Air Handler

Before we delve into the wiring diagram, let's take a moment to understand the role of the air handler in an HVAC system. The air handler, also known as the blower or fan coil unit, is responsible for circulating conditioned air throughout your home or building. It works in conjunction with the outdoor unit, which houses the compressor and condenser. The air handler contains various components, including the blower motor, control board, transformer, and relays, all of which need to be wired correctly for the system to function properly.

Importance of a Wiring Diagram

A wiring diagram is a visual representation of the electrical connections in a system. It serves as a roadmap for technicians and homeowners, enabling them to understand how the different components are interconnected. Having a wiring diagram at hand is essential for troubleshooting, installation, or any modifications to the system. It ensures that the wiring is done correctly, minimizing the risk of electrical issues and ensuring optimal performance.

Locating the Wiring Diagram

Manufacturer's Documentation

Goodman provides comprehensive documentation for all its products, including air handlers. The wiring diagram is typically included in the installation manual or the technical specifications sheet. These documents can be found on Goodman's official website or obtained from the HVAC equipment distributor.

Model Number Identification

If you are unable to locate the wiring diagram in the documentation, you can identify the model number of your air handler and contact Goodman's customer support. They will be able to provide you with the appropriate wiring diagram specific to your unit.

Understanding the Symbols

Common Symbols Used

Wiring diagrams use a standardized set of symbols to represent various electrical components and connections. It is essential to familiarize yourself with these symbols to interpret the diagram accurately. Some of the common symbols you will encounter in a Goodman air handler wiring diagram include:

  • Circle: Represents a point where wires are connected
  • Line: Represents a wire or electrical connection
  • Square: Represents a switch or relay
  • Zigzag Line: Represents a resistor or heating element
  • Triangle: Represents a transformer

Color Coding

In addition to symbols, wiring diagrams often use color coding to indicate the function of wires. While the colors may vary between manufacturers, some common color codes include:

  • Black: Line voltage (120V or 240V)
  • Red: Low voltage (24V)
  • Green: Fan control
  • Yellow: Cooling control
  • White: Heating control

Identifying Components

Blower Motor

The blower motor is responsible for circulating air through the system. It is typically located inside the air handler and is connected to the blower wheel or fan. The wiring diagram will indicate the necessary connections for the blower motor, including power supply and speed control.

Control Board

The control board acts as the brain of the air handler, receiving signals from thermostats or control systems and coordinating the operation of various components. It is responsible for controlling the blower motor, relay switches, and other functions. The wiring diagram will show the connections for power supply, thermostat wiring, and other control inputs.


The transformer is a crucial component that steps down the voltage from the line voltage (120V or 240V) to the low voltage (24V) required for control circuits. It is typically indicated by a triangle symbol on the wiring diagram. The diagram will show the primary and secondary voltage connections, as well as any necessary jumpers or fuses.

Relays and Switches

Relays and switches are used to control various functions in the air handler. They can be represented by square symbols on the wiring diagram. The diagram will indicate the necessary connections for relays, including power supply, control inputs, and output connections.

Following Safety Precautions

Power Off

Before working on any electrical components, always ensure that the power supply to the air handler is turned off. This can be done by switching off the circuit breaker or disconnecting the power source. Working on live wires can be extremely dangerous and should be avoided at all costs.

Proper Insulation

Ensure that all wires are properly insulated and protected. Any exposed wires can pose a safety hazard and increase the risk of electrical shorts or shocks. Use appropriate wire connectors, electrical tape, or conduit to protect the wires and prevent accidental contact.


Proper grounding is essential to ensure electrical safety. Make sure that the air handler is properly grounded according to local electrical codes. This will help prevent electrical faults and protect both the system and individuals from potential harm.

Consulting a Professional

When to Seek Professional Help

While understanding the wiring diagram is crucial for basic troubleshooting and maintenance, it is important to know when to seek professional help. If you are unsure about any aspect of the wiring or if the system is not functioning correctly, it is recommended to consult a licensed HVAC technician. They have the expertise and experience to diagnose and resolve complex electrical issues.

Benefits of Professional Installation

Professional installation not only ensures that the air handler is wired correctly but also guarantees compliance with local electrical codes and regulations. Additionally, hiring a professional can help prevent any potential damage to the system or voiding of warranties due to improper installation or wiring.


Understanding the wiring diagram for a Goodman air handler is essential for proper installation, troubleshooting, and maintenance. By familiarizing yourself with the different components, symbols, and color coding, you can confidently wire your air handler and ensure its optimal performance. Remember to always follow safety precautions and consult a professional when necessary. We hope this guide has provided you with valuable insights into Goodman air handler wiring!

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