What will happen if you don’t change your air filter?

A dirty air filter can be to blame for a huge amount of furnace and air conditioner problems. Some of the most common of those problems include:

  • High energy bills. A dirty air filter forces your air handler to work harder in order to push air through, which dramatically increases your system’s energy consumption.
  • Overheating and breakdowns. Because a dirty filter forces your HVAC system to work harder than it’s designed to, your system has the potential of overheating and breaking down.
  • Dirty air bypassing the filter. When return air is blocked by a dirty filter, that unfiltered air will redirect and bypass your filter. That means that dirt can build up on your system and its coils, and your home’s air will be less healthy to breathe.
  • Frozen coils. Since a dirty filter allows dirt to build up on your coils, your system will not be able to transfer heat as effectively and your coils can easily freeze over.


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