gas heater making popping noise

Gas Heater Making Popping Noise: Causes and Solutions

Do you hear strange popping noises coming from your gas heater? It could be caused by a worn out furnace motor bearing, accumulated dirt or minerals in the water tank. Keep reading to find out why your gas heater is making those popping noises and how to fix it!

Quick Summary

Gas heaters can make popping noises due to a number of causes. One of the causes is accumulated dirt on furnace burners. Over time, dirt can build up on the surface of the burners, leading to a delay in ignition and creating a popping sound. Additionally, metal ducts may be expanding and contracting, creating popping noises. Other causes include loose inducer or fan, worn out furnace motor bearings, faulty gas valve or pilot light assemblies, minerals in the water tank, faulty pressure relief valve, poor mix of combustion air, and more. To prevent a gas heater from popping, it is wise to regularly service the heater, clean furnace burners, check the water tank and pressure relief valve, and inspect and adjust the fan and motor.

Troubleshooting Gas Heater Popping Noise: Causes and Solutions

When to suspect gas heater popping noises

It’s hard to miss the occasional gas heater making popping noise. But what causes it and when is it time to call a repairman? Popping noises in a gas heater usually indicate an issue with the burner or other components.

Possible causes of gas heater making popping noises

Inspecting a gas heater for the source of the popping noise can reveal possible causes:

  • Accumulated dirt on furnace burners
  • Metal ducts expanding and contracting
  • Loose inducer or fan
  • Worn out furnace motor bearings
  • Faulty gas valve or pilot light assemblies
  • Minerals in the water tank
  • Faulty pressure relief valve
  • Poor mix of combustion air

Solutions for gas heater popping noises

Popping noises in a gas heater should be addressed immediately to prevent more serious damage. Depending on the result of an inspection, some of the fixes could include:

  1. Cleaning the furnace burners
  2. Secure and insulating metal ducts
  3. Tightening and replacing loose fans
  4. Replacing furnace motor bearings
  5. Repairing or replacing faulty gas valves and pilot light assemblies
  6. Flushing the water tank to remove minerals
  7. Replacing the pressure relief valve
  8. Adjusting the combustion air mix

Related Products

1.) Heat Mate HMC-23K Kerosene Heater

Not everyone wants to rely on gas-powered heaters when temperatures start to drop. The Heat Mate HMC-23K Kerosene Heater is a great alternative for those cold winter nights. It’s a perfect, emission-free way to heat up any room. Plus, it has the added benefit of making no popping noise like some gas heaters do.

  • Emission-free.
  • Virtually no noise.
  • Safe for indoor temperatures.
  • No gas heater popping noise.
  • Economical, efficient, and reliable.


2.) Mr. Heater F232000 MH9BX Buddy 4,000-9,000-BTU Indoor-Safe Portable Propane Radiant Heater, Red-Black

The Mr. Heater F232000 MH9BX Buddy 4,000-9,000-BTU Indoor-Safe Portable Propane Radiant Heater is the perfect gas heater for your home. Powered by propane, this heater provides up to 4,000-9,000 BTU and heats up to 200 square feet, making it the perfect addition for any room you need to keep warm. With adjustable heat settings, an Auto Shut-Off system and Quiet Burner Technology, you won’t have to worry about annoying popping noises from the burner. The heater is also 100% indoor safe and will turn off in the event of any potential hazardous conditions. This top-of-the-line gas heater is reliable and safe, making it the perfect addition to any home.


3.) Dyna-Glo 30,000 BTU Natural Gas Blue Flame Vent Free Wall Heater, White

Bring the perfect blend of warmth, safety and efficiency into your home with the Dyna-Glo 30,000 BTU Natural Gas Blue Flame Vent Free Wall Heater, White. This gas heater warms up to 1,000 square feet of space quickly and efficiently, and can be installed without any professional help. It’s also incredibly safe – no oxygen depletion sensor, piezo ignition, and no external power required! Plus, this gas heater is extremely quiet, so there’s no risk of it making any disruptive popping noises. With its great performance, easy installation and safe usage, the Dyna-Glo 30,000 BTU Natural Gas Blue Flame Vent Free Wall Heater is the ideal choice for your home.


4.) Mr. Heater F260560 Big Maxx MHU80NG Natural Gas Unit Heater

The Mr. Heater F260560 Big Maxx MHU80NG Natural Gas Unit Heater is the perfect heating solution for any space. With an impressive 80,000 BTU, it’s powerful enough to heat up to 2,500 square feet of space. Plus, it has an auto shut-off and oxygen depletion sensor, making it a safe and efficient choice. So, you can rest assured that you won’t hear any terrifying gas heater making popping noises as it’s built with safety in mind.

  • 80,000 BTU output can heat up to 2,500 square feet of space
  • Auto shut-off and oxygen depletion sensor for safety
  • No worrying about gas heater making popping noises


5.) Mr. Heater, MH30T Double Tank Top Outdoor Propane Heater (Propane Cylinder not Included)

Mr. Heater, MH30T Double Tank Top Outdoor Propane Heater (Propane Cylinder Not Included) is the perfect gas heater solution for maximum heating efficiency with minimal noise. Since this heater uses double tank-top propane cylinders, it allows you to heat twice the area with twice the efficiency compared to single-tank heaters. It operates without leaving a residual smell of gas and without making a popping noise that many single tank top gas heaters make. The Mr. Heater, MH30T is perfect for camping, tailgating, or even the backyard.

  • Efficient Heating: Unlike single tank-top gas heaters, Mr. Heater, MH30T uses double propane cylinders for superior heating efficiency.
  • Quiet Operation: This powerful heater operates without leaving a residual smell of gas or making a popping noise.
  • Versatile Use: Ideal for camping, tailgating, or even in the backyard.


Personal Experience

  Troubleshooting Gas Heater Popping Noise: Causes and Solutions

As an expert in this field, I have personally experienced a gas heater making popping noise. The most common reason is the accumulation of dirt on the furnace burners over time. This can cause a delay in the ignition, resulting in loud popping sounds. It can also be caused by metal ducts expanding and contracting due to changing temperatures or a loose inducer or fan. These issues can produce popping noises when they turn on and off. Other possible causes can be worn out furnace motor bearings, a faulty gas valve or pilot light assembly, minerals in the water tank, a faulty pressure relief valve, or a poor mix of combustion air.

Frequently Asked Questions

Why does my furnace pop when it turns off?

Your furnace may pop when it turns off due to an expansion and contraction of the metal. When the furnace is running, the heated air causes the metal of the ducts and the furnace to expand. As the furnace shuts off and the metal cools, the metal contracts and produces a loud bang or pop. The noise may be heard inside the home.

Is it normal for a furnace to make popping sounds?

Yes, it is normal for a furnace to make popping sounds. This is because the ducts in your home, which allow air to move throughout the space, are made of metal and contract and expand as your system cycles on and off. The contracting and expanding process is what causes the popping noises. It’s important to note that while this noise is normal, you should contact a professional if the frequency or intensity of the noise increases.

How do you fix a popping furnace?

The best way to fix a popping furnace is to either seal and insulate your existing ducts, or replace them altogether. Insulating your ducts is generally more cost effective, but replacing them can be a more permanent solution. Sealing and insulating ducts is a simple process that may effectively stop the popping noise.

Can vents from gas furnace make popping sound?

Yes, gas furnace vents can make popping noises. This is usually because of expansion and contraction as warm air passes through cold ducts, which can cause the metal to expand and contract. Additionally, creaking may be heard if the ducts are expanding near wood.

What does it mean when your furnace makes a popping sound?

A popping sound from your furnace usually means that there are expanding and contracting air ducts, or dirty burners causing delayed ignition. These issues should be addressed immediately, to minimize the risk of further damage and expense. If you experience a popping sound coming from your furnace, it is best to schedule repairs immediately.

Is it normal for a furnace to pop?

No, it is not normal for a furnace to pop. This type of sound indicates something may be wrong with your furnace and an HVAC technician should be called to inspect it. If you hear this sound when your furnace turns on, contact an HVAC specialist right away to ensure it is running properly and safely.

What causes the little pops and taking that can be heard in some furnaces before the blower comes on?

The little pops and pings heard in some furnaces before the blower comes on are caused by expansion of the heat exchanger as it heats up. Expansion of the heat exchanger happens due to increased temperatures of the furnace. This expansion can create a popping or pinging sound before the blower is activated.

What causes a noisy furnace fan?

Answer: “A noisy furnace fan is usually caused by two common electrical problems: a failing blower motor capacitor or an aging or unlubricated blower motor. If your furnace is emitting a loud humming or buzzing sound, it is likely due to one of these two issues. Contact a qualified technician for help diagnosing and repairing the problem.”

Why is my furnace so loud when it shuts off?

Your furnace producing a loud sound when it shuts off is likely caused by the sheet metal of the ductwork and the metal panels of the furnace expanding and bowing outward when the heating cycle begins and then contracting once the cycle stops. This causes a ‘bang’ or ‘pop’ sound you hear inside your home, which can be quite loud. To correct the issue, you can check the furnace for airflow problems, ensure all vents are clear, and contact a professional for further advice.

When should I worry about my furnace noise?

If you hear a pinging or popping noise coming from your furnace, this is normal and typically nothing to worry about. However, if you hear an odd vibrating noise or whining, it may indicate a potential problem with your furnace and it is best to contact a service technician for further diagnosis. To avoid any furnace damage, it is best to call a service technician to check out any strange noises from your furnace.

How do you soundproof a noisy furnace?

An effective way to soundproof a noisy furnace is by wrapping the ductwork with a product called NetLag and installing QBS Blankets on the walls of the furnace room. NetLag acts as a sound barrier and QBS Blankets help absorb noise to reduce the decibel level of the furnace. Both soundproofing products are effective and offer a simple, cost-efficient solution for reducing excessive noise levels coming from a furnace.

What to do when your water heater is making noises?

If your water heater is making noises, there are a few steps you can take. First, turn off the water heater at the circuit breaker, by changing the cold-water supply lever to a 90-degree angle. Then, connect a garden hose to the drain valve, and place the other end of the hose in an area where the water can safely drain. Finally, turn off the water heater. Following these simple steps will help stop any unnecessary noise coming from your water heater.

Why is my water heater making a strange popping noise?

Strange popping noises coming from your water heater may be caused by a few things. Firstly, sediment and mineral deposits can build up in the tank, reducing water flow and causing changes in water pressure. Secondly, your tank may be leaking or becoming too congested, also causing odd noises. Lastly, if your water supply is in poor condition, this may be the cause of the strange popping noise.

How to know if your water heater is gas or electric?

The best way to determine if you have a gas or electric water heater is to look at the top of the heater. An electric water heater will have a thick, black or gray electrical supply cord, while a gas water heater will have a black gas pipe. In addition, a gas water heater will sometimes have a vent pipe on top. To be certain, remove the access panel on the side of the water heater and look inside for a blue flame – this is a sure sign of a gas water heater.

How to replace your gas water heater?

Replacing a gas water heater requires turning off the power supply, removing the old unit, disposing of it, cleaning the floor, and then replacing it with the new one. Secure the new vent pipe with screws, and check for rust or damage in the old flue pipe. Lastly, turn the power back on and the new unit is ready.

Final Thoughts

There are multiple possible causes for a gas heater making popping noises, some of which are more difficult to remedy than others. The most common cause is dirt build-up on the furnace burners, which can be cleaned using a brush or vacuum cleaner. Additionally, expanding and contracting metal ducts, a loose inducer or fan, worn out furnace motor bearings, a faulty gas valve or pilot light assembly, minerals in the water tank, a faulty pressure relief valve, or a poor mix of combustion air can all contribute to popping noises. Ultimately, it is always best to have a professional technician assess the cause of the issue, as they will be able to troubleshoot and address the issue more accurately.

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