Air Filter Fell In Furnace – What To Do?

Air Filter Fell In Furnace – What To Do

An air filter is required for every Home Furnace because it is a barrier to keep dust particles out. However, your air filter could become entangled in the furnace. What should you do if this happens at home? We asked the experts.

Here’s what you can do if your air filter fell in the furnace.

  1. Turn off the furnace as soon as possible before it burns out.
  2. If the air filter is nearby or on a surface, remove it by opening the furnace access cover.
  3. Seek professional assistance if the filter is stuck in the pipe.
  4. Change the old air filter to a new one. If you don’t act quickly, the furnace air filter can cause damage to the system. Continue reading to learn what to do if the air filter falls into the furnace.

What to Do If an Air Filter Fell in a Furnace:

If you do not change your air filter regularly at home, you risk damaging your furnace. This means that too much heat can destroy your system. It can be almost as expensive as replacing the entire system.

1. Switch Off The Furnace:

One of the most common fire sources is the furnace. A clogged air filter restricts airflow. It may fall into the furnace if it becomes too clogged. In this condition, the furnace and home could be severely damaged, posing a fire hazard.

2. Turn On The Furnace:

Before removing the air filter, remove the furnace jug access cover. It can be removed if the air filter is close to or on the surface. However, it is risky, so we recommend you consult an expert beforehand.

3. Seek Professional Assistance:

Mold can grow in duct systems. Cleaning dusty ducts require the assistance of a professional. When dust is reintroduced into the air, it can make breathing difficult and aggravate allergies and sneezing.

4. Change The Filter:

The air filter in the furnace should be checked and replaced. We recommend changing the filter regularly if you have allergies or a dog.

Also, Read: How Often Should Furnace Cycle?

Why Do Air Filters Collapse In The Furnace?

The following are the most common causes of air filter failure in furnaces:


Under fan load, a heavily clogged air filter can fail. As a result, the air filter may fall inside the furnace. This can severely damage the engine and necessitates immediate professional repair.

A Thin Air Filter:

Fragile and inexpensive air filters, especially if they are clogged, can be sucked into your furnace. Instead of a filigree glass fiber filter, we recommend using a high-quality, robust polyester filter. It may be more expensive, but you won’t have to buy and replace air filters frequently.

Incorrect Installation:

An upside-down air filter can also fall into the furnace. Please carefully read the instructions and install the air filter correctly. Also, ensure that the filter is completely seated in the slot. Consult an expert if you have any questions about your filters regarding regular maintenance.

The Advantages of Frequent Air Filter Replacement:

Regular air filter maintenance and replacement are critical for properly operating your furnace. The dust and dirt that accumulates in air filters is difficult to remove. Replace the air filter regularly.

Here are some of the advantages it provides you and your home.

  1. The key to cleaner, healthier, and fresher indoor air is to replace the air filter in your furnace. Clean air benefits everyone’s health, especially children and the elderly. Clean indoor air can benefit your health and ability to sleep.
  2. Consider changing your air filter more frequently if you have multiple people or pets in your home and the environment appears dusty. I don’t want to live in an environment where I’m at risk.
  3. Finally, replacing the air filter regularly will extend the system’s life and reduce the need for maintenance. You can save money on heating and lighting. Consider installing a home filtration system if you have symptoms such as an itchy nose or difficulty breathing.

Also, Read: Furnace Maintenance Checklist – 7 Easy Steps

Signs That Your Air Filter Is Working Correctly:

If your air filter exhibits any of these symptoms, it should be cleaned or replaced.

Discoloration Of The Air Filter:

Replace the air filter if it has become discolored and is covered with dust or hair. Particles from a clogged filter can pollute the air in your home.

Costs Of Energy Have Risen:

A significant increase in your monthly electricity bill is another sign that your filters aren’t working. Clogged filters restrict circulation, causing your system to work harder and consume more energy to circulate the air in your home. The air volume is small. The amount of air that can pass through a clogged filter is reduced. As a result, there is less air circulation.

How to Change an Air Filter

You can quickly and easily change your air filter, save money on energy, and keep your air fresh and clean by following these simple steps.

1. Select The Appropriate Size:

Before purchasing a new air filter for your new home, ensure that your old one is properly installed, there are no gaps, and the filter is not bent. If you can’t find the correct nominal size, order a custom air filter size.

2. Turn Off The Power:

The power switch is typically located on the furnace’s side. Before continuing, make sure that this switch is turned off. Turn off the power to the fuse box when the switch is not visible to avoid danger.

3. Take Out The Old Air Filter:

Inside the furnace, the air filter is usually hidden beneath a slotted vent cover. Some covers pop out, while others require a few screws to secure them. Remove the lid with care and set it aside.

4. Remove The Old Filter:

Dirt particles become trapped in the old filter, so keep a garbage bag handy and dispose of the old filter as soon as possible.

5. Add A New Filter:

Place the new item carefully into the available space after ensuring that all directional arrows point in the correct direction.

6. Attach The Cover:

Finally, you can unfold or tighten the body to improve air quality, protect your system, and lower your energy bill.

In conclusion:

You have nothing to worry about now that you know what to do if your air filter falls into the furnace, as long as you can react quickly if something happens. You can also hire a professional to ensure that everything is done correctly. To keep things running smoothly, air filters and furnaces must be serviced regularly.

Disclosure: We may get commissions for purchases made through links in this post.

About the author


A mechanical engineer with HVAC experience. Experienced in the air conditioning and heating processes, and capable of providing the most up-to-date information and solutions to reported air conditioning device problems.