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Signs Your Furnace Heat Exchanger Has Cracked

If you've been noticing unusual and disruptive noises from your furnace recently, it could signal a problem. Normally, furnaces should not make loud and disruptive noises. If you're experiencing such sounds, getting a professional to inspect your furnace and determine the root cause is essential.

This article will review common sounds that may indicate a cracked heat exchanger.

Need A Furnace Repair? Call Advantage Air Mechanical.

If you hear strange sounds from your furnace, contact our trustworthy and highly-trained technicians at Advantage Air Mechanical at (520) 792-9400 for a repair. With our fast, convenient scheduling and fair and honest prices, we make sure all our customers are 100% satisfied at the end of every service call.

Noise #1: Rattling or Clanging

If you hear rattling or clanging sounds from your furnace, it's time for a service call. Loose parts within the furnace or improperly tightened components like ductwork connections, furnace panels, or blower motor bearings can cause this issue. A quick fix involves identifying the loose part and tightening it back in place. However, a high-pitched rattling before your furnace kicks on might indicate a cracked heat exchanger, a more serious problem that may require replacement.

Noise #2: Buzzing or Humming

If you notice a buzzing or humming sound coming from your furnace, it's likely due to an electrical issue. Addressing electrical problems promptly is crucial, and it's best to have them handled by trained professionals like our courteous and knowledgeable technicians, given the potential dangers involved. Common electrical problems that lead to buzzing or humming noises include a faulty blower motor capacitor, a bad transformer, a failing inducer motor, or a blower motor that is deteriorating or lacks lubrication.

Noise #3: Squeaking or Squealing

Squealing or squeaking noises often indicate an issue with the blower or airflow maintenance. When blower motors have worn-out bearings due to overheating or age-related wear and tear, they tend to produce high-pitched squeals during operation. On the other hand, whistling sounds result from the blower struggling to pull in sufficient air for efficient functioning. This problem could be caused by a dirty air filter, closed or obstructed air vents, or dirty/damaged ducts. For whistling, you can check and ensure your vents are open and change the air filter. If these steps don't resolve the issue or if the noise resembles more of a squeal, don't hesitate to contact our HVAC professionals for a thorough diagnosis and repair of your system.

Noise #4: Banging or Popping

Banging and popping noises are often attributed to two common issues. Firstly, a delayed furnace ignition can cause gas to accumulate in the combustion chamber, resulting in a small explosion within the system once ignition occurs. This activity can harm your furnace and requires immediate attention to check for gas supply or pilot light problems, as well as misaligned or dirty burners. If the banging originates from your ducts, it may be due to an issue with your air filter, obstructed vents, or dirty/undersized ductwork. While some noise from the ducts is normal, excessive sounds should prompt action and investigation.

Knowing When to Call in the Pros

When it comes to furnace repairs, it's always best to rely on a professional to ensure the work is done correctly. While DIY repairs might seem cost-effective, simple mistakes can lead to more significant issues and higher costs in the long run. To avoid expensive repairs, consider regular preventative maintenance, scheduling inspections at least twice a year—once before the cold season and again when the weather turns warm.

For any electrical problems, issues with the gas source, or suspicions of furnace heat exchanger damage, it's crucial to have a dependable licensed HVAC technician, like ours at Advantage Air Mechanical, handle the job. Our experts guarantee high-quality repairs with the right tools and materials, giving you peace of mind and extending the lifespan of your HVAC investment.

Looking for an Experienced HVAC Professional To Take a Look at Your Furnace Heat Exchanger?

At Advantage Air Mechanical, we're known for our fair and honest prices, and none of our technicians are paid on commission, so you never have to worry about upselling beyond the services you need. With more than 30 years of experience, we're qualified to handle all your HVAC needs, and our 100% satisfaction guarantee backs our work. Take advantage of our fast and convenient scheduling by calling us at (520) 792-9400 or setting up your appointment below.