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What’s That Noise? When a Noisy HVAC System Requires an Expert

What’s That Noise? When a Noisy HVAC System Requires an ExpertHomeowners often ignore problems with their heating and cooling systems. They hear an odd noise but because the unit still blows hot or cold air, they ignore the issues. Unfortunately, this can result in costly repairs that could have been avoided if they just knew what to listen for.

Your sense of hearing is one of your greatest aids in determining problems with the HVAC System. If you hear an odd noise, it could be that you need to schedule a maintenance call.

Which HVAC Noises Are Serious?

Some noises are normal, but here is a list of some that you should keep an eye on.

1. Squealing

If it sounds like there is a mouse stuck in your furnace, look for a loose blower belt, a malfunctioning motor, or shaft bearings that need lubricating.

2. Popping

If your furnace is making a cracking or popping noise, it could be that your burners are dirty. This slows the igniting process, which in turn allows gas to build up and explode, making a popping noise. Be certain that you are keeping your burners clean.

3. Whistling

You whistle with your mouth by forming an opening with your lips; likewise, a whistling furnace could mean that there is a hole or opening somewhere in the ducts. Whistling can also be caused by incorrectly-sized ducts, as well as clogged filters.

4. Rattling

A rattling noise generally means that something is loose. Look for loose screws, nuts, and bolts. If you can’t find any, schedule a maintenance check.

5. Scraping

If you are hearing a noise that sounds like metal scratching against metal, turn your furnace off. This is likely a problem with your blower wheel and could cause your system further damage if left unattended. Call a professional and look into repairs or replacement as needed.

How to Prevent Problems with Your HVAC System

There are several things you can do to help prevent problems with your HVAC system.

  • Check your thermostat on a regular basis.
  • Clean your vents and ducts.
  • Change your filters accordingly.
  • Schedule an annual inspection by a professional.

An odd noise coming from your furnace does not always mean a costly repair or replacement; sometimes, the fix is very easy. Routine maintenance by HVAC experts can save you money and possibly prevent you from having to replace your furnace.

If your furnace is alerting you to potential problems, and you would like more information on how to fix them, call Northern Climate Control. Our highly-trained, fully-licensed, and insured technicians serve the homeowners in the Denver Metro area.