Why Your HVAC Unit is Making Popping Sounds

Its design prevents it from making annoying sounds inside your home.

Your HVAC may get noisy frequently if it’s brewing a problem.

A popping sound often has dire consequences for your HVAC system and safety. It sounds almost like popcorn popping or cracking and can be very uncomfortable. Turn your system off first when you hear the popping sounds. If your unit freezes up or builds up ice, you will likely hear popping noises. When your unit freezes up, it triggers a sensor that eliminates the ice. Your HVAC system enters defrost mode to clear the ice. As the ice melts, it cracks and falls off, creating disruptive sounds. While this may seem normal, repeated, and too close together, it signals a deeper problem. Then you should call an HVAC technician for a thorough inspection. Water can damage some electrical components in your HVAC unit. During fall, your HVAC is likely to be exposed to rainwater. and damaging some components, the water may also cause your system to make popping noises. If you hear popping sounds from your HVAC system and smell burning, electrical malfunctions may be the culprit. Electrical sparks caused by rodents or wear and tear can cause fires in your unit. Fire in your unit is a high-risk safety situation for you and your loved ones. You should turn off your main switch and call an HVAC professional if you hear popping sounds. If the popping sounds are coming from your ductwork, you have ductwork problems. Your ductwork is essential for air distribution, which makes it liable to debris/dust build-up and loose connections after prolonged use. Loose connections and your ducts wearing out can cause popping noises when air passes through. Poorly installed ductwork can also cause popping noises. The ducts will shake when the air passes through them due to improperly secured ducts. Consistent popping noises can cause discomfort and indicate a faulty HVAC system. When you hear cracking or popping noises from your system, avoid DIY inspections and fixes.

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