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

October 07, 2015

One of the most common problems that we encounter at Service Experts Heating & Air Conditioning in Dublin 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 create comfort is a lot bigger than most homeowners realize. Regardless if it is cooling season or heating season, having a filthy air filter can cause a number of issues for your heating and AC system.

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

  • Reduced airflow. This is easily the largest issue 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 hinders air from passing through the filter as it should, meaning your system is working significantly harder to provide you with the same amount of air.
  • Frozen coil. If your system is running harder as a result of a filthy air filter, you also run the risk of having the cooling coil freeze inside of the system, because it’s operating overtime to give you 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 excessively. When your system short cycles, it can 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
  • Lower 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 get around any possible 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 various air filters available, give Service Experts Heating & Air Conditioning a call at or schedule an appointment online.

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