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

October 07, 2015

One of the most common issues that we encounter at Church Services in Houston is dirty air filters. They may seem like a very insignificant piece of the whole home comfort puzzle, but the role they play in helping us maintain comfort is a lot bigger than most homeowners recognize. Regardless if it is cooling season or heating season, having a clogged air filter can cause a variety of issues 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 may encounter:

  • Diminished airflow. This is easily the greatest 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 inhibits air from passing through the filter as it should, meaning your system is working a lot harder to provide you with the same amount of air.
  • Frozen coil. If your system is working 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 unchanged 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 can overheat or break down from the added work, potentially causing damage to your system.

In addition to these, you can also expect:

  • A shortened equipment lifecycle
  • Decreased energy efficiency
  • Lower air quality
  • Greater 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 avoid any potential damage that may 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 number of air filters we carry, give Church Services a call at or schedule an appointment online.

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