What Happens If Your Furnace Air Filter Isn’t Changed?

What Happens If Your Furnace Air Filter Isn’t Changed?

A high-quality HVAC filter is essential to trap dirt particles and toxic contaminants from spreading in your home. An air filter prevents pollutants from entering your homes’ atmosphere and degrades indoor air quality. HVAC systems contribute the most to indoor air quality and your health.

There are many side effects of not replacing the air filter as per schedule. When you call our heating and air expert in Chico, CA, to fix the HVAC issues, most of them are caused due to a clogged air filter. For this reason, it makes sense to replace the filter every three months to avoid several health and HVAC system issues.

Outcomes of Not Changing a Furnace Air Filter

The HVAC functions effectively only if the air filter is clean. Here are some consequences of not replacing the HVAC air filter, where you might need to call our technician to fix the problems:

  • HVAC Malfunctions: The furnace filter has a limit to collecting dirt particles. Once it reaches the limit, it will not trap any dust particles until you replace or clean it. Not removing the air filter can cause clogging and expensive repair, making the indoor atmosphere uneasy with disturbing operational noises and odors.
    In due time, you will need a heating and air conditioning repair in Chico, CA, to fix your malfunctioning HVAC. It is easy to avoid all unnecessary repairs by replacing the air filter at the start of the winter.
  • Poor Indoor Air: The indoor air is more polluted than the outdoor air, and you may fall sick if the air quality index declines. The pollutant contaminants in the air can cause sore throat, nausea, dizziness, breathing problems, allergies, and other illnesses. Replacing the furnace filter is one of the essential steps to maintaining clean air.
  • Expensive Bills: A dirty filter affects the furnace’s functioning and makes the heating operation difficult. As a result, the furnace will work harder to maintain the performance levels and deliver the desired outcome. However, the increased workload can cause the furnace to consume more electricity leading to high electric bills.
    You need to change the furnace air filter before scheduling a furnace repair in Chico because your furnace system shut down due to overheating.
  • HVAC System Life: A dirty filter causes various issues to the HVAC, and these problems reduce the system’s life. Timely air filter replacement and getting your furnace serviced annually by our technician can help increase the lifespan of your unit.

Frequency of Air Filter Replacement

The frequency of furnace repairs in Chico, CA, and its longevity depends on the filter’s condition.

Below are details on when to replace the filter:

  • A 1-3 inch furnace air filter should be replaced once every 30-90 days.
  • The 4-5 inch pleated air filter can work effectively for 6-9 months.
  • Change the 6-inch HVAC air filter once every 9 to 12 months.

A washable air filter also needs a cleanse. To maintain a clean filter and efficient HVAC, you should get your HVAC thoroughly cleaned by our HVAC contractor in Chico, CA.


You may need to invest in other indoor air-enhancing solutions like an air purifier to maintain air quality apart from high MERV-rating air filters if the pollution index in your region is high.

Feather River Aire Heating & Cooling provides energy star-rated HVAC and air filtration systems to help you maintain indoor air quality. Call (530) 207-8695 and schedule a service with technicians from one of the best HVAC contractors in Paradise, CA.

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