How to stop a heater from banging?

Author: Branson Hamill  |  Last update: Wednesday, April 30, 2025

Clean Any Dirty Burners If you hear a banging noise when your furnace turns on, this sound is typically caused by dirty burners inside the unit. Carbon and soot, as well as dirt and other debris, can build up on the furnace's burners and restrict the ignition of gas inside the unit.

Why is my heater making a banging noise?

Dirty furnace burners.

As a result, gas will build up inside of your furnace and when the ignition finally begins, it creates a miniature explosion inside of your system that makes a loud banging sound. This can be a serious safety issue with your system that can also lead to a cracked heat exchanger.

Why is my electric heater banging?

There could be a few reasons why heaters make this sound, like dirty burners that need cleaning, or an excessive amount of gas inside the chambers. If you hear a banging or popping sound when the heater shuts off, it could mean your ductwork is contracting as the metal cools down.

How to stop vents from banging?

Insulate the Vent: Use acoustic insulation or foam tape around the edges of the vent cover to dampen sound. This can help reduce vibrations and noise. Adjust the Airflow: If possible, adjust the airflow using dampers. Reducing airflow can sometimes decrease noise levels.

How do I stop my heater from ticking?

Turn the heat up and listen to where sounds are coming from to identify where the issue is. You may find areas where pipes are touching walls or other items that cause noise. The easiest fix is to shorten the pipe. Cut the pipe and pull it gently away from the wall until it has 1 inch clearance.

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How do I stop my heater from banging?

Replace Your Dirty Furnace Filter

Heat causes the metal material to expand and push outward – when the cycle stops and the metal cools, it contracts and pops back into place, generating that loud banging sound that you hear indoors. In this case, the best solution is simply to change the dirty air filter.

How do I stop my heating from clicking?

How to stop your heating pipes from making noises
  1. Bleed your radiators.
  2. Clean your system.
  3. Secure loose pipes.

How do I stop my heating pipes from banging?

Ideally, it shouldn't be able to move too much. Then, you should check to see if any pipes are touching things they shouldn't be, such as joists and other pipes. In these areas, apply felt between the pipe and the surface to prevent a banging or groaning noise when the heating comes on.

How to stop vent from flapping?

Adding Weight: Adding weight to the damper can prevent it from flapping in the wind. This can be done by attaching small weights or magnets, but ensure they don't obstruct the closing mechanism. Spring-Loaded Dampers: Consider upgrading to a spring-loaded damper.

Do duct silencers work?

The duct silencers enable maintaining proper acoustic parameters in the rooms – even reducing noise in the rooms which require a high degree of acoustic comforts, such as e.g. sleeping rooms or reading rooms. The noise can be generated not only by the flow of air through the ducts.

Why does my radiator heater make a banging sound?

Why do radiators clank? Well, knocking, banging, and clanking radiator sounds are generally a sign of trapped water or air in the system. When either gets stuck, steam is prevented from moving through the pipe into the radiator.

What to do if your heater is making noise?

Furnace Screeching or Scraping

The blower fan may have come loose, letting the blades drag across the furnace casing. A scraping noise can also indicate other parts of the system have loosened. If you are unsure of the cause of the noise, turn the furnace off and have a technician come and take a look at it.

How do you fix a banging water heater?

Flushing the tank regularly can get rid of this sediment and stop the noise. High water pressure can also cause the banging. If the pressure is too high, it can make the water heater sound like it's banging. Fixing this by adjusting the pressure regulator or adding a water hammer arrestor can help.

How do I stop my heater from rattling?

Furnaces have several panels that cover various components. Over time, these panels may come loose and start rattling when the furnace is running. A loose panel can be easily fixed by tightening the screws that hold them in place.

What causes loud banging noise in a house?

The banging noise you heard is typically caused by your water pipes, and it is one of a few sounds that can come from your plumbing. While a water hammer could be the explanation, starting with a survey of all your visible water lines can help you fix or rule out any other causes.

How do I lubricate my furnace blower bearings?

You'll probably have to remove an access plate to get at the ports. If the blower has grease cups instead of oil ports, remove the screw caps that cover the cups and fill the cups with bearing lubricant, which is available at automotive and hardware stores. When you lube the motor, you should also check the belts.

Why do I hear banging in my vents?

As the system heats up or cools down, the ductwork material expands and contracts, causing popping or banging noises. Blocked Airflow: Obstructions in the ductwork, such as debris, dust, or even small objects, can restrict the airflow. As air pressure builds up, it can suddenly release, leading to banging noises.

How to stop fan banging?

There are several ways to reduce noise from your pedestal fan. Tightening loose parts, balancing the blades, cleaning the fan regularly, and using lower fan speeds can help. Additionally, placing the fan on a level surface away from walls can minimize vibrations.

How do I reduce noise in my vent duct?

Steps to soundproof ductwork include changing the structure of the ductwork, lining the interior with sound absorption, creating a soundproof barrier for the exterior, and adding baffles for soundproofing inside the air vents.

Why does my heater make a banging sound?

Air pressure buildup within your HVAC system can push against the walls of the ducts, causing them to expand, which causes a banging or popping sound several seconds after you turn the system on. Improperly installed ductwork often results in bending, which increases static pressure within the system.

Can a pipe burst from heat?

Most people are aware that freezing temperatures can cause pipes to burst, but many are shocked to find out that hot weather can increase the risk of pipes bursting as well. If you have ever wondered why your pipes are breaking or separating during the summertime, you are in the right place! Prefer video?

How do I stop my heater from clicking?

Gas furnaces rely on a smooth ignition process to kickstart the heating cycle. Clicking noises during ignition could signify issues with the pilot light or electronic ignition system. Solution: Schedule a professional inspection to clean or replace the pilot light, ignition components, or flame sensor.

Why do my heating pipes make a banging sound?

Kettling issue is most common in hard water areas, where the boiler's heat exchanger accumulates limescale that constrict the flow of water. The heat exchanger becomes too hot and ultimately expands and causes heating pipes to making loud banging noises.

How to fix a water hammer?

To do this, shut off your home's main water valve, then open the highest faucet in your home. Next, turn on the lowest faucet in your home and keep it on until all water has drained. Finally, reopen the main water valve to refill your pipes.

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