What to Do About Strange Noises from Your HVAC System

HVAC system sounds

Woman Waking Up

Most homeowners are well aware of the strange noises that a building can make. As various parts shift, expand, and contract with the temperatures, and gradually settle, you can hear noises ranging from the subtle to the startling. Quite often some of these noises come from your HVAC system. While most of the noises you hear in your Florida home are probably nothing to worry about, it is important to understand HVAC system sounds so you know when there should be cause for concern.

Whistling from the Air Filter

If you hear a whistling or wheezing noise coming from the area that houses the filter, it could be an indicator that you need to change your air filter check the manufacturer's instructions or consult your HVAC technician if you are not sure how often the filter should be changed. You will also likely need to change or replace your filter during periods of heavy use. A clogged air filter forces your heater or air conditioner to work harder than necessary and will also pollute your indoor air.

Knocking or Clanking

Knocking and clanking noises can be really unsettling. Apart from being disruptive, especially at night, it might seem as if something is seriously wrong. These kinds of sounds are sometimes common, for example, when you turn on your heating system for this first time. However, it can also indicate that something has come loose somewhere in the system. It could be something simple, but it could be a serious matter or could lead to more serious problems. It is best to contact your HVAC technician as soon as possible so that you can avoid more costly repairs or even system failure.

Rattling from the Outdoor Unit

We don't usually think about the outdoor unit, especially since it is generally tucked away outside the house in an area that we rarely visit. It is important that we pay attention to this critical part of the HVAC system. Your outdoor unit houses the compressor and condenser, both of which play very important roles in removing hot air from your home and returning cool air. Noises within the outdoor unit can mean there is a loose part. Since the unit is exposed to the elements outdoors, items such as tree branches can sometimes become lodged within it. It is always recommended that nothing should come within two feet of the outdoor unit on all sides, or within five feet of the top of the unit. When mowing, take care so that clippings and other material are directed away from the unit. Anything caught within it can lead to damage. You should contact a professional HVAC technician for a prompt repair before the problem worsens. It is best to leave the job to the experts because parts such as the fins can be easily damaged. Your HVAC technician will have the tools and expertise to carefully remove any obstructions, and check to ensure that there has been no further damage to the system.

Scratching or Rattling in the Walls or Ceiling

If you hear a scratching or rattling sound in the walls or ceiling, it could be a small animal somewhere in your ductwork. This is not a common problem, but it does occur. The creatures can usually find their way out, but if they don't, the noise they make can be unnerving. They can also cause damage to your system. Additionally, waste from these animals can pollute your indoor air, and if they die in the ductwork, rooms throughout your home will become filled with the foul smell of decay. Contact a pest control professional if an animal is trapped within anywhere inside your home.

Preventive Maintenance

One of the most effective ways to prevent damage to your system is to take advantage of routine or preventive maintenance programs. During a maintenance visit, your technician will thoroughly inspect and clean the system and make any needed repairs. Regular maintenance provides several important benefits for your system, including:

  • Reducing the likelihood of unexpected breakdown
  • Improving performance and efficiency
  • Increasing life expectancy
  • Reducing energy consumption and energy bills
  • Enhancing indoor comfort

Your HVAC system is a very important and expensive investment. Take care of it by signing up for a regular maintenance plan. Even for safety reasons, you should address any noises in your HVAC system right away. Loose parts not only affect efficiency and performance but could lead to electrical problems that could be a fire hazard.

If there is any noise coming from anywhere within your HVAC system don't hesitate. Contact Air Control Heating & Cooling at 850-391-4300. We have been providing reliable HVAC services for almost 50 years, and our technicians have the training and experience to service various types of HVAC systems. We can diagnose and repair HVAC issues and help you to understand what kind of sounds you should expect from your air conditioning system. Call us today for efficient service you can count on every time.

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