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

October 07, 2015

One of the most routine problems that we hear about at Abbey Air Service Experts Heating & Air Conditioning in Oakville is dusty air filters. They might seem like a very tiny piece of the big home comfort puzzle, but the role they play in helping us control comfort is a lot greater than most homeowners notice. Regardless if it is cooling season or heating season, having a dirty air filter can cause a host of problems 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 might encounter:

  • Decreased airflow. This is easily the largest issue 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 hinders 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 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 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 all the time. 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 diminished equipment lifecycle
  • Decreased 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 avert 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 carry, give Abbey Air Service Experts Heating & Air Conditioning a call at or schedule an appointment online.

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