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Why Is My Heat Pump So Loud?


Strange or loud noises coming from your HVAC system can be one of the most unsettling and stressful sounds you encounter as a homeowner. Loud noises generally mean something has gone wrong, which in turn can mean needing HVAC repairs or worst-case scenario, having to do without for a while. We’ve compiled this list of possible sounds you are hearing from your heat pump and what they mean.

3 Reasons Why Your Heat Pump Is So Loud


Whistling Noises

If you’re hearing a whistling sound, this usually means air is rushing in quickly through a small opening. This could mean a variety of issues such as; dirty air filters on your system or even possibly from objects being placed in front of air registers and vents restricting the airflow going in or out.

Jarring, Clanking, Metal-to-Metal Sounds

Sometimes heat pumps make loud noises that sound like metal hitting metal inside the unit. You should turn your unit off right now and do a quick inspection of the fan. These “metal to metal” sounds are most often the result of fan blades knocking against something inside the unit, such as a chunk of ice or possibly another component.

Buzzing, Bubbling, and Screeching Sounds

A soft buzzing sound coming from your heat pump is typically a normal sound to expect. Internal coils and other components make a smooth buzzing sound as they run. However, a bubbling sound could be due to low refrigerant, so if you hear this sound- be sure to check the level of refrigerant. And, if your motor bearings get dirty, this can cause a high-pitched screeching sound. If you’re hearing these sounds they are not normal and warrant a call to your HVAC technician right away.

Wrapping It Up

If you are hearing any of these sounds coming from your heat pump, it may be time to call in a professional.

Southern Pride Service, Inc is ready to assist you with determining why your Heat Pump is making loud noises. Contact us today to schedule an appointment with our friendly Southern Maryland heating technicians.