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: Repeated ignition failures may indicate issues with the pilot or ignition control module, disrupting 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: Over time, a hot surface igniter can wear out, causing ignition failures that require replacement.

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 resolve the issue, but underlying problems must be addressed.

Thermostat Malfunctions: A Small Device, Big Impact

Thermostat issues can significantly impact furnace performance:

Blower Motor Problems: Reduced or insufficient airflow due to a malfunctioning blower motor can result in inefficient heating and cold spots.

Faulty Ignition System: A faulty ignition system may cause your furnace to repeatedly attempt to start, leading to unnecessary wear and tear.

Burner Assembly Issues: Inefficient combustion caused by burner assembly problems can reduce heat output.

Heat Exchanger Damage: A damaged heat exchanger can pose safety hazards, including the release of carbon monoxide.

Fan and Belt Issues: Insufficient airflow can lead to overheating, causing 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 potential safety issues:

Role of the Flame Sensor: Confirms the presence of a consistent flame during heating.

Malfunction Due to Dirt or Residue: A dirty sensor might fail to detect the flame, causing the furnace to shut down as a safety measure.

Inadequate Flame Detection: This shutdown prevents gas buildup without a functioning flame, averting potentially dangerous situations.

Electrical Issues: A Common Source of Furnace Failures

Modern furnaces rely on a complex electrical system to initiate and control heating cycles. Common electrical components include:

Thermostat: Sends signals to the furnace to trigger heating cycles.

Ignition System: Starts the burners.

Blower Motor: Circulates warm air throughout the home.

Safety Controls: Monitor various aspects of the heating process.

Furnace breakdowns can be inconvenient and uncomfortable, especially during the cold months. At Airmaster Heating & Air Conditioning, we provide reliable heating and cooling services in Lawrenceville, GA. By staying informed about ignition and pilot control problems, thermostat malfunctions, and the importance of a clean flame sensor, you can keep your furnace in optimal condition. Take proactive measures to prevent breakdowns and enjoy a warm, comfortable winter by scheduling HVAC maintenance and repair in Alpharetta, GA. Don’t wait for the chill to set in—act now!