5 Most Common Causes Behind Your Furnace Breakdown!

While it can be a frustrating experience, understanding the common culprits behind furnace breakdowns is the first step to preventing them. At Airmaster Heating & Air Conditioning, we specialize in providing top-notch heating and cooling in Lawrenceville, GA.

 

Understanding Common Ignition and Pilot Control Problems

Your furnace’s ignition and pilot control system plays a crucial role in starting the heating process. When these components malfunction, it can lead to a breakdown and a chilly home.

Furnaces commonly utilize one of three types of ignition systems:

Intermittent Pilot Problems

  • Frequent Ignition Failures: If your furnace repeatedly fails to ignite, it may be due to issues with the pilot or ignition control module. This can disrupt the heating cycle.
  • Gas Valve Issues: Problems with the gas valve can prevent the pilot from lighting, halting the heating process.

Hot Surface Ignition Problems

  • Cracked or Worn Igniter: The hot surface igniter can wear out over time, causing ignition failures. Replacing it is a common fix.
  • Burner Assembly Problems: A malfunctioning burner assembly can lead to ignition issues and uneven heating.

Standing Pilot Problems

  • Pilot Light Extinction: A standing pilot may go out due to drafts or thermocouple issues. Relighting the pilot can temporarily fix the problem, but underlying issues need attention.

Thermostat Malfunctions: A Small Device, Big Impact

Furnaces are intricate machines with numerous mechanical components that must work together seamlessly. When these components develop issues, your furnace’s performance can suffer. Here’s how mechanical issues can cause your furnace to break down:

  • Blower Motor Problems: Reduced or insufficient airflow due to a malfunctioning blower motor can lead to inefficient heating and cold spots in your home.
  • Faulty Ignition System: Without a functional ignition system, your furnace may repeatedly attempt to start, causing unnecessary wear and tear.
  • Burner Assembly Issues: Problems within the burner assembly can lead to inefficient combustion and reduced heat output.
  • Heat Exchanger Damage: A damaged heat exchanger poses a safety hazard due to the potential release of carbon monoxide, an odorless, and potentially lethal gas. If you believe this is an issue, it’s best to call your leave home and call your gas company for inspection.
  • Fan and Belt Issues: Insufficient airflow can cause overheating in parts of the furnace, leading to damage and eventual breakdown.

Mechanical Issues: When Components Go Awry

Furnaces are intricate machines with numerous mechanical components that must work together seamlessly. When these components develop issues, your furnace’s performance can suffer. Here’s how mechanical issues can cause your furnace to break down:

  • Blower Motor Problems: Reduced or insufficient airflow due to a malfunctioning blower motor can lead to inefficient heating and cold spots in your home.
  • Faulty Ignition System: Without a functional ignition system, your furnace may repeatedly attempt to start, causing unnecessary wear and tear.
  • Burner Assembly Issues: Problems within the burner assembly can lead to inefficient combustion and reduced heat output.
  • Heat Exchanger Damage: A damaged heat exchanger poses a safety hazard due to the potential release of carbon monoxide, an odorless, and potentially lethal gas. If you believe this is an issue, it’s best to call your leave home and call your gas company for inspection.
  • Fan and Belt Issues: Insufficient airflow can cause overheating in parts of the furnace, leading to damage and eventual breakdown.

Dirty or Faulty Flame Sensor: A Cause for Concern

The flame sensor plays a vital role in your furnace’s safety and efficiency. When it becomes dirty or malfunctions, it can lead to heating problems and potentially dangerous situations.

  • Role of the Flame Sensor: The flame sensor’s primary purpose is to confirm the presence of a consistent and stable flame during the heating process.
  • Malfunction Due to Dirt or Residue: A dirty flame sensor might not be able to confirm the presence of a flame, leading to the furnace shutting down as a safety precaution.
  • Inadequate Flame Detection: This shutdown is a protective measure to prevent the buildup of gas without a functioning flame, which could lead to gas leaks or dangerous situations. If a gas leak is suspected, make sure to call the gas company and an HVAC contractor in Alpharetta, GA, to address the problem immediately.

Electrical Issues: A Common Source of Furnace Failures

When it comes to the reliability of your furnace, the electrical system plays a pivotal role. A modern furnace relies on a complex network of electrical components to initiate and control its heating cycles. However, like any electrical system, it can be prone to issues that, if left unaddressed, may result in furnace failures.
A typical furnace’s electrical system encompasses a range of components, each with a specific function in the heating process. These components include:

  • Thermostat: The thermostat is the user interface for setting the desired temperature. It sends electrical signals to the furnace to trigger heating cycles.
  • Ignition System: Modern furnaces often use electrical ignition systems to start the burners.
    Blower Motor: Without electricity, the blower motor will not be able to circulate warm air throughout your home.
  • Safety Controls: Furnaces incorporate safety controls and switches that monitor various aspects of the heating process.

Furnace breakdowns can be not only inconvenient but also uncomfortable, especially during the cold months. Recognizing and addressing the common issues behind these breakdowns is key to keeping your home warm and cozy. At Airmaster Heating & Air Conditioning, we understand the importance of a reliable heating system, which is why we offer top-tier heating and cooling  in Lawrenceville, GA. By staying informed about ignition and pilot control problems, thermostat malfunctions, mechanical issues, and the importance of a clean and functioning flame sensor, you can ensure that your furnace stays in optimal condition, providing consistent warmth for your home by scheduling HVAC maintenance and repair in Alpharetta, GA. Don’t wait for the chill to set in—take proactive measures to prevent furnace breakdowns and enjoy a comfortable winter.