What Happens When You Don't Change Your Furnace's Air Filter

October 07, 2015

One of the most basic issues that we encounter at Freschi Service Experts in Concord is dusty air filters. They might seem like a very insignificant piece of the whole home comfort puzzle, but the role they play in helping us control comfort is a lot larger than most homeowners notice. Regardless if it is cooling season or heating season, having a filthy air filter can cause a variety of problems for your heating and AC system.

So what exactly happens when you don’t remember to swap out your air filter? Here are a just a few of the side effects you might encounter:

  • Decreased airflow. This is easily the largest headache you’ll recognize when your home’s air filter is badly clogged. The longer the air filter goes without being changed, the more dirt, dust and other particles build up. Of course, this inhibits air from passing through the filter as it should, meaning your system is working significantly harder to provide you with the same amount of air.
  • Frozen coil. If your system is running harder as a result of a filthy air filter, you also run the danger of having the cooling coil freeze inside of the system, because it’s running overtime to leave you with cool air.
  • Total loss of cooling or heating. This is also a possibility if your air filter goes neglected for months and months on end. In essence, you will have worked your system so hard that something quits working or wears out and needs to be replaced or serviced.
  • Short cycling. Short cycling means the heating and cooling system turns on and off all the time. When your system short cycles, it may overheat or break down from the added work, potentially causing damage to your system.

In addition to these, you can also expect:

  • A shorter equipment lifecycle
  • Decreased energy efficiency
  • Lower air quality
  • Greater dust and debris
  • Lack of comfort

If you’re not sure when you last switched out your air filter, it may be a good time to do so in order to get around any likely damage that might come with a dirty air filter. If you don’t know where your home’s air filter is located or you simply have a question about the number of air filters available, give Freschi Service Experts a call at or schedule an appointment online.

Contact Us