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

October 07, 2015

One of the most common concerns that we come acress at Service Experts Heating & Air Conditioning in Salt Lake City is dirty air filters. They may seem like a very insignificant piece of the overall home comfort puzzle, but the role they play in helping us maintain comfort is a lot bigger than most homeowners realize. Regardless if it is cooling season or heating season, having a clogged air filter can cause a number of issues for your heating and AC system.

So what exactly happens when you neglect to switch out your air filter? Here are a just a handful of the side effects you might encounter:

  • Reduced airflow. This is easily the greatest headache you’ll note 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 prevents air from passing through the filter as it should, meaning your system is working a lot harder to leave you with the same amount of air.
  • Frozen coil. If your system is operating harder because of a dirty 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 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 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, which could end up causing damage to your system.

In addition to these, you can also expect:

  • A shortened equipment lifecycle
  • Lower energy efficiency
  • Diminished 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 get around any potential damage that may come with a clogged 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 we have, give Service Experts Heating & Air Conditioning a call at or schedule an appointment online.

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