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

October 07, 2015

One of the most routine problems that we encounter at Strand Brothers Service Experts in Austin is filthy air filters. They can seem like a very small piece of the overall home comfort puzzle, but the role they play in helping us create comfort is a lot larger than most homeowners notice. Regardless if it is cooling season or heating season, having a clogged air filter can cause a number of concerns for your heating and AC system.

So what exactly happens when you forget to swap out your air filter? Here are a just a handful of the side effects you could encounter:

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

In addition to these, you can also expect:

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

If you’re not sure when you last swapped out your air filter, it may be a good time to do so in order to avert any likely damage that could come with a filthy air filter. If you don’t know where your home’s air filter is located or you simply have a question about the various air filters we have, give Strand Brothers Service Experts a call at or schedule an appointment online.

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