Furnaces can make strange noises, from banging and popping to humming and whistling. While some of these noises are simply due to the furnace’s regular operation, others may indicate a more severe problem. If your furnace is making a whistling noise, it could be caused by several issues like being unbalanced, a dirty blower, a clogged air filter, or problems with ductwork. We’ll explore these below.

1. Unbalanced Blower Wheel

The blower wheel is responsible for circulating air through your furnace; if it’s unbalanced, it can create a lot of vibration and noise. The good news is that this is an easy fix that your local HVAC technician can handle in no time.

2. Dirty Blower Wheels or Fan Blades

The blower motor circulates air throughout your home and has a set of blades or wheels that help move the air. Over time, these blades can become covered in dust and debris, which can cause them to start making a whistling noise.

3. Clogged Air Filter

A clogged filter restricts the airflow through the furnace, causing the blower to work overtime. This can lead to premature wear and tear on the blower motor, decreased efficiency and increased heating costs. Therefore, you should replace the air filter with a new one and get a professional technician to inspect the blower.

4. Ductwork Issues

Ductwork issues, specifically cracks or holes in your ducts, can cause whistling sounds as air passes through them and can also lead to heat loss. If you think this might be the issue, contact a professional technician to take a look and make any necessary repairs.

Get in Touch With Professionals Today

Schmitt Refrigeration, Heating & Air provides top-notch heating, air conditioning and refrigeration services in Evansville, IN, and the surrounding areas. We understand your comfort is essential, so we’re proud to offer 24/7 emergency services. Call us today, and we will get you taken care of.

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