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Goodman Furnace Ignitor Glows No Flame

Goodman Furnace Ignitor Glows No Flame? How to Troubleshoot and Fix It

Wondering why Goodman furnace ignitor glows no flame? When your Goodman furnace ignitor glows but fails to ignite the flame, it's often a result of a faulty, damaged, or dirty…

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Wondering why Goodman furnace ignitor glows no flame?

When your Goodman furnace ignitor glows but fails to ignite the flame, it’s often a result of a faulty, damaged, or dirty ignitor/sensor. While cleaning the sensor and replacing the ignitor can resolve this common furnace problem, it’s important to consider other potential causes that may need to be addressed for an ultimate solution.

Let’s face it,

Having a Goodman furnace ignitor that glows but doesn’t produce a flame is a common issue that many homeowners encounter. This problem can disrupt the heating system’s functionality and compromise both comfort and safety. It’s crucial to address this issue promptly to restore proper heating and ensure a safe living environment for you and your family.

You don’t have to panic or call a professional right away. You can troubleshoot and fix this problem yourself in five easy steps. In this blog post, we will show you how to do it. Let’s get started!

Understanding the Goodman Furnace Ignitor

The ignitor is a vital component responsible for igniting the fuel and initiating the combustion process. It serves as the catalyst that ignites the gas to produce the flame necessary for heat generation.

When the ignitor glows, it indicates that it’s receiving the electrical current required to reach a high temperature. This intense heat is necessary for igniting the gas and creating the flame that fuels the furnace. Therefore, a glowing ignitor is a promising sign that the heating system is functioning correctly and is ready to produce the desired warmth.

However, if the ignitor glows but fails to ignite the gas or produce a flame, it suggests several possible causes for this issue, such as:

  • The gas valve is not opening, preventing the gas from reaching the ignitor
  • The ignitor is too weak or damaged, preventing it from igniting the gas
  • There is no gas supply, due to a leak, a blockage, or a shut-off valve

Now that we understand the basics of the Goodman furnace ignitor, let’s explore the potential reasons why it might glow without producing a flame and how to address them effectively in the next section.

READ: The Ultimate Guide to Goodman Furnace Problems

Reasons Why the Goodman Furnace Ignitor Glows but No Flame Appears

Insufficient Gas Supply

One possible reason for a glowing ignitor without a flame is an inadequate gas supply. This can occur due to various factors that affect the gas flow to the furnace. Let’s explore some potential causes and learn how to check and resolve gas supply issues effectively.

  1. Closed Gas Valve: A closed gas valve prevents the flow of gas to the furnace. This can happen accidentally or due to maintenance work. Check the gas valve and ensure it is fully open. If it’s closed, turn it on and verify if the ignitor now ignites the gas.
  1. Low Gas Pressure: Insufficient gas pressure can also result in a glowing ignitor without a flame. Low gas pressure can be caused by issues with the gas line or the utility provider. To address this, check other gas appliances in your home to see if they are also experiencing low pressure. If so, contact your gas utility provider to resolve the issue.

By identifying and rectifying insufficient gas supply issues, you can restore the proper functioning of the furnace and ensure the ignitor ignites the gas to produce the necessary flame.

Faulty Flame Sensor

The flame sensor plays a crucial role in detecting the presence of a flame in the furnace. When it malfunctions, the ignitor may glow but fail to ignite the gas. Let’s delve into the function of the flame sensor and outline troubleshooting steps for a potentially faulty sensor.

  • Function of the Flame Sensor: The flame sensor is responsible for sensing the presence of a flame once the gas is ignited. It ensures that the burner remains lit and shuts off the gas supply if no flame is detected, promoting safety.
  • Troubleshooting a Faulty Flame Sensor: A malfunctioning flame sensor can be due to various reasons, such as dirt buildup or sensor misalignment. To troubleshoot, carefully clean the flame sensor using fine sandpaper or a soft cloth. Ensure the sensor is properly positioned and aligned with the flame. After cleaning and repositioning, test the furnace to see if the ignitor now ignites the gas.

Ignitor Wear and Tear

Over time, regular usage can cause the ignitor to deteriorate, leading to a glowing ignitor but no flame. Let’s explore how wear and tear can affect the ignitor and provide guidance on inspecting and determining if it needs replacement.

  • Effects of Regular Usage: The ignitor is exposed to high temperatures and experiences repeated heating and cooling cycles. This can cause it to wear down, develop cracks, or become brittle, affecting its ability to ignite the gas effectively.
  • Inspecting and Replacing the Ignitor: Inspect the ignitor for signs of wear, such as visible cracks, discoloration, or a worn-out appearance. If any of these signs are present, it’s advisable to replace the ignitor. Consult the manufacturer’s instructions or seek professional assistance to ensure proper installation of the new ignitor.

By addressing issues related to insufficient gas supply, faulty flame sensors, and worn-out ignitors, you can troubleshoot the problem of a glowing ignitor without a flame effectively. In the next section, we will provide a step-by-step guide on troubleshooting and fixing this issue to restore the furnace’s functionality.

READ: How To Safely Light Your Goodman Furnace Pilot Light

Goodman Furnace Ignitor Glows No Flame: Troubleshooting and Fixing the Issue

To address the issue of a glowing ignitor without a flame, follow this step-by-step guide to troubleshoot and fix the problem:

  1. Check the Gas Supply: Begin by ensuring that the gas supply is properly connected and the gas valve is fully open. Verify that there are no obstructions in the gas line and that the gas pressure is adequate.
  1. Examine the Flame Sensor: Carefully inspect the flame sensor for any buildup of dirt, debris, or oxidation. Use a soft cloth or fine sandpaper to clean the sensor gently. Ensure that the flame sensor is properly positioned and aligned with the flame for accurate detection.
  1. Inspect the Ignitor: Thoroughly examine your  Goodman ignitor for signs of wear, such as cracks, discoloration, or brittleness. If any damage or wear is evident, it’s advisable to replace the ignitor with a new one. Follow the manufacturer’s instructions or consult a professional for proper installation.
  1. Address Each Potential Cause: Based on the troubleshooting steps above, address each potential cause systematically. Ensure the gas supply is sufficient and properly connected, clean and align the flame sensor, and replace the ignitor if necessary.

By following this step-by-step guide, you can troubleshoot the issue of a glowing ignitor without a flame and restore the proper functioning of your Goodman furnace. However, it’s important to prioritize your safety during troubleshooting. If you are uncomfortable or unsure about any step, it’s recommended to seek professional assistance.

I'm an HVAC enthusiast and a passionate writer dedicated to sharing valuable insights and practical tips about heating, cooling, ventilation, and air conditioning systems.

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Hi there, I'm Robert Brooks

Hi there, I'm Robert Brooks

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