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

One of the most routine concerns that we hear about at Service Experts Heating & Air Conditioning in North America is dusty air filters. They can seem like a very insignificant piece of the big home comfort puzzle, but the role they play in helping us maintain comfort is a lot larger than most homeowners notice. 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 swap out your air filter? Here are a just a couple of the side effects you might encounter:

• Diminished airflow. This is easily the biggest headache you’ll note when your home’s air filter is badly clogged. The longer the air filter goes without being swapped out, the more dirt, dust and other particles build up. Of course, this prevents air from passing through the filter as it should, meaning your system is working a lot harder to give you the same amount of air.
• Frozen coil. If your system is running harder due to a clogged air filter, you also run the danger of having the cooling coil freeze inside of the system, because it’s working overtime to leave you with cool air.
• Total loss of cooling or heating. This is also a possibility 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 could overheat or break down from the added work, potentially causing damage to your system.

In addition to these, you can also expect:

• A diminished equipment lifecycle
• Lower energy efficiency
• Diminished air quality
• More dust and debris
• Lack of comfort