Air Filter Fell In Furnace – What To Do?

Air filter fell in furnace - what to do?

Key Takeaway

Discover the essential steps to take when your air filter gets stuck in the furnace. Immediate action is crucial to prevent potential hazards and damage. Learn expert-recommended solutions and understand the importance of regular filter maintenance for a safe and efficient home heating system.


Because it acts as a barrier to keep dust particles out, an air filter is necessary for every home furnace. The furnace, though, can interfere with your air filter. What actions should you take if this occurs at home? We polled the professionals.

What to do if your air filter becomes stuck in the furnace, is listed below:

  1. Before it burns out, turn off the furnace as soon as you can. Open the furnace access lid and take out the air filter if it is nearby or on a surface.
  2. If the filter is caught in the pipe, seek professional assistance.
  3. Replace the outdated air filter with a new one.
  4. The furnace air filter has the potential to harm the system if you don’t take immediate action. If the air filter accidentally falls into the furnace, keep reading to find out what to do.

What To Do If A Furnace’s Air Filter Falls In:

What to Do If a Furnace's Air Filter Falls in:

At home, if you don’t change your air filter frequently, your furnace could get damaged. This means that your system can be ruined by too much heat. It can cost almost as much as completely rebuilding the system.

1. Turn Off The Furnace First:

The furnace is one of the most frequent sources of fire. The airflow is restricted by a blocked air filter. If it becomes too clogged, it could fall into the furnace. A fire hazard would result from the furnace and house being in this condition.

2. Turn The Furnace On:

Take off the furnace jug access cover before removing the air filter. If the air filter is close to or directly on the surface, it can be taken off. We advise you to speak with a specialist in advance because it is dangerous

3. Look for Expert Advice:

In ductwork, mold can develop. A professional’s assistance is necessary while cleaning dusty ducts. Dust reintroduction can make breathing challenging and increase allergies and sneezing.

4. Modify The Filter:

The furnace’s air filter has to be examined and changed. If you have allergies or a dog, we advise changing the filter frequently.

If the airflow is restricted by a blocked air filter and it falls into the furnace, it can pose a fire hazard, endangering both the furnace and the house.

Also, Read: How Often Should Furnace Cycle?

Why Do Air Filters Break Down In A Furnace?

Why Do Air Filters Break Down In A Furnace?

The most typical reasons for furnace air filter failure include the following:


A severely blocked air filter may malfunction when the fan is running. The air filter can as a result drop into the furnace. The engine could be seriously harmed by this, necessitating an urgent professional repair.

A Slim Air Filter:

It’s possible for cheap, flimsy air filters to get sucked into your furnace, especially if they’re blocked. We advise employing a superior, durable polyester filter as opposed to a filigree glass fiber filter. You won’t need to buy and replace air filters as regularly even if it may be more expensive.

Mistaken Installation::

Additionally, an air filter turned upside-down may tumble into the furnace. Please carefully read the directions and correctly install the air filter. Make sure the filter is inserted all the way into the slot. If you have any concerns about the regular upkeep of your filters, speak with a professional.

A severely blocked air filter can malfunction during the fan operation, causing it to drop into the furnace. This can lead to serious damage to the engine, necessitating urgent professional repair.

The Benefits of Changing Air Filters Frequently:

The Benefits of Changing Air Filters Frequently:

For your furnace to function correctly, routine maintenance and filter replacement are essential. It is challenging to get rid of the dust and debris that collect in air filters. Air filters should be changed frequently.

Here are a few benefits for you and your house that it offers:

  1. Improved Indoor Air Quality.
  2. Health Benefits for All.
  3. Extended System Lifespan.
  4. Reduced Maintenance Costs.
  5. Energy Efficiency.

Regularly changing air filters not only improves air quality but also extends the system’s lifespan, reducing maintenance costs. It enhances energy efficiency, preventing a significant increase in monthly electricity costs due to clogged filters.

Also, Read: Furnace Maintenance Checklist – 7 Easy Steps

Signs That Your Air Filter Is Operating Properly Include:

You should clean or replace your air filter if it displays any of these signs.

The Air Filter Discoloration:

If the air filter has developed a discoloration or is hair or dust-covered, replace it. The air in your home might become contaminated by particles from a clogged filter.

Energy Price Increases:

A big increase in your monthly electricity cost is another indication that your filters need to be replaced. Filters that are clogged make the system work harder and use more energy to circulate the air in your home. The air is not very big. A blocked filter can only handle a smaller volume of air at a time. Less air is circulated as a result.

If the air filter shows discoloration or is covered with hair and dust, it indicates contamination and the need for replacement. Clogged filters can increase electricity costs, as the system works harder and uses more energy to circulate air.

Changing An Air Filter

Changing An Air Filter

By following these straightforward instructions, you can change your air filter quickly and easily, save money on energy costs, and maintain clean, fresh air in your home.

1. Decide On The Correct Size:

Before investing in a new air filter for your new house, make sure the old one is installed correctly, there are no gaps, and the filter is not bent. Order a bespoke air filter size if you can’t locate the right nominal size.

2. Cut the Power:

The power switch is normally found on the side of the furnace. Make sure that this switch is off before continue. In order to prevent danger, turn off the electricity to the fuse box when the switch is hidden.

3. Eliminate The Outdated Air Filter:

The furnace’s air filter is often covered with a slotted vent cover. Some covers simply snap off, while others need to be fastened with a few screws. Carefully remove and set aside the lid.

4. Dispose of the Old Filter:

The old filter becomes clogged with dirt, so have a rubbish bag nearby and get rid of it as soon as you can.

5. Add A Fresh Filter:

After making sure that all directional arrows point in the right way, gently place the new item into the open space.

6. Adding the Cover:

To increase air quality, safeguard your system, and reduce your energy costs, you can finally unfurl or tighten the body.

Before investing in a new air filter, ensure proper installation, and order a custom size if needed. Safely cut power and follow step-by-step instructions for a seamless air filter replacement.


Now that you are aware of what to do in the event that your air filter is sucked into the furnace, you don’t need to worry as long as you are able to respond fast. You can also engage an expert to guarantee that everything is completed perfectly. Furnaces and air filters need to be repaired frequently to keep everything operating smoothly.

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

About the author


I am Ben , a seasoned HVAC specialist with over 6 of experience in the HVAC industry. I holds HVAC Certification and has a proven track record in providing expert advice on HVAC systems.