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

October 07, 2015

One of the most routine issues that we hear about at Service Experts Heating & Air Conditioning in Niagara Falls is filthy air filters. They can seem like a very insignificant piece of the big home comfort puzzle, but the role they play in helping us control 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 variety of concerns for your heating and AC system.

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

  • Diminished airflow. This is easily the biggest problem you’ll recognize when your home’s air filter is severely 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 significantly 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 working overtime to provide 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, which could end up causing damage to your system.

In addition to these, you can also expect:

  • A diminished equipment lifecycle
  • Reduced energy efficiency
  • Diminished 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 avert any potential 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 we carry, give Service Experts Heating & Air Conditioning a call at or schedule an appointment online.

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