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

October 07, 2015

One of the most routine issues that we encounter at Donelson Air Service Experts in Nashville is dusty air filters. They may seem like a very insignificant piece of the overall home comfort puzzle, but the role they play in helping us control comfort is a lot greater than most homeowners realize. Regardless if it is cooling season or heating season, having a clogged air filter can cause a number of problems for your heating and AC system.

So what exactly happens when you neglect to swap out your air filter? Here are a just a couple of the side effects you may encounter:

  • Reduced airflow. This is easily the largest headache you’ll note when your home’s air filter is very clogged. The longer the air filter goes without being switched, the more dirt, dust and other particles build up. Of course, this prevents air from passing through the filter as it should, meaning your system is working quite a bit harder to give you the same amount of air.
  • Frozen coil. If your system is working 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 provide you with cool air.
  • Total loss of cooling or heating. This is also a possibility if your air filter goes unattended for months and months on end. In essence, you will have worked your system so hard that something breaks 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 could 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
  • Reduced energy efficiency
  • Decreased air quality
  • Increase in dust and debris
  • Lack of comfort

If you’re not sure when you last changed your air filter, it may be a good time to do so in order to avert any potential damage that could 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 various air filters we have, give Donelson Air Service Experts a call at or schedule an appointment online.

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