Why is my air return vent so loud?

Since the air return sucks air, they are prone to getting clogged, especially if your home is particularly dusty. When vents or ducts are clogged with dust and debris, the result is reduced airflow which can cause annoying noises. Believe it or not, where the vent is placed can really have an impact on how noisy it is.

How do I make my HVAC return quieter?

High static pressure makes airflow more audible

1. Adjust the fan speed. Your blower or furnace fan should be set to deliver the proper airflow per ton.
2. Add ductwork.
3. Add a bypass duct.
4. Add or expand grilles and registers.
5. Replace existing registers and grilles with high velocity models.

Why is my HVAC thumping?

Thumping Thumping can occur inside your house when the filter hits the return grille (the piece that covers the duct and filter) or when the blower fan has come loose. Thumping can also indicate a broken seal or hole in the ductwork.

How do I stop my ductwork from banging?

Dampers can either be open or closed. Check the dampers on the supply side of your ductwork and try opening them up one at a time to see if this reduces the popping and banging noises. You can also adjust the actuator inside of the duct dampers up or down to reduce the duct noises.

Why is my HVAC so loud inside?

If excess noise is coming from the indoor components, such as the ductwork or vents, there may be something obstructing the airflow. Dander, dust, and even small animals can get stuck in the ductwork of your system.

Why is my new furnace so loud?

The wonderful “wha-boom” noise you’re hearing when your furnace comes on is likely one of two things. It could be your duct work doing what’s called “oil-canning”—that is, flexing when the pressure changes—or, less likely but more serious, it could be a small explosion called a “roll-out.”

Why does my AC unit sound like a jackhammer?

1. AC Banging Noise. Banging is usually a sure sign that there’s a loose or broken part — a connecting rod, piston pin or crankshaft — inside the air conditioning compressor. A banging noise may also indicate that your system needs a compressor replacement.

Why does my furnace sound like a helicopter?

If your furnace sounds like an airplane or jet engine taking off, it’s usually a gas issue. Gas could be leaking from a line or valve. Or, if you hear a click before the swooshing sound, you may have a broken heat exchanger that is leaking gas.

Why does my heating ductwork make banging noises?

Causes of Banging or Popping in Ductwork When the heating or cooling system comes on, there’s an expected buildup in pressure within the ducts. The expanding pressure can cause the long sides of the rectangle to expand as the air is flowing. This can cause an initial popping or banging noise.

Why is my HVAC blower so loud?

Most likely the blower fan has become loose and is creating the sound by hitting against the blower house casing. A metal-scraping sound needs to be addressed right away, and requires the attention of a professional HVAC technician.

Why is my new AC so loud inside?

Your indoor or outdoor unit could be so loud for a few of the following common reasons: Most units use isolation padding to absorb the motion noise produced by the internal parts, especially the fan. These pads can wear over time and begin to crumble and break, increasing the noise level of your air conditioning unit.

Why does my AC make a high pitched noise?

In most cases, a high-pitched whistling sound means that your air conditioner isn’t getting enough airflow through the return vents and ductwork: the ones that pull air from your home to the air conditioning evaporator coils to cool it. Your air conditioner has to work harder to pull enough air through the system.

Why is my HVAC system making loud noises?

But if the banging is extremely loud, contact an HVAC company to check it out, as the damper may need to be repaired or replaced. If you have sheet metal ducts, you may be hearing creaking noises from the ducts expanding and contracting from the pressure and temperature changes.

Do you hear a high-pitched noise coming from your return air vent?

Do you hear a high-pitched, tuning-fork type of sound coming from your return air vent, the metal grille that pulls air into your heating and cooling system? It’s a situation we hear happening to several homeowners. This high-pitched sound is typically the sign of low return airflow . In other words, your system’s blower is “starved for air.”

Why does my air conditioner make a whistling noise?

When you close those doors, the air has to sneak under the small gaps of the doors to make their way into the return grill. So the blower has to work harder to pull in more air, causing the whistling noise. So, whenever possible, keep doors in your rooms open.

Why does my air conditioner make a knocking noise when turned off?

When the air conditioner turns off, the pump loses momentum, which can cause it to knock against the case of the compressor and create a banging or slamming noise. The fix: To get rid of the noise, you’d have to replace the whole compressor since it is a single, sealed part.