The Major Consequences of Not Changing Your Air Filter

December 18, 2019

Updated May 30th, 2024

The air filter is an integral part of your HVAC system. It helps filter out dirt and soot in the air, thereby easing your HVAC unit’s workload. When the filter starts getting too dirty, you need to change it. Here are some bad things that can occur when you fail to replace the air filter periodically.

Higher Energy Bills

If your filter becomes too dirty, it will cause your heating system to work harder to heat your home. Your utility bill will be higher while providing zero benefits.

Negative Impact On Your Health

Your air filter traps dust and other contaminants. Once it is clogged, these contaminants will start blowing into your home. This can result in dizziness, itchy throats and eyes, and headaches. Over the long-term, it can result in respiratory diseases.

Your Heater Will Fail

Since the heating system has to work harder when the filter is clogged, it will not last as long as it is designed to. The heater will be overworked and eventually fail. Air filters are relatively inexpensive while a new heating system can cost you between $4,000 to $12,000.


If air can’t pass through the filter, hot air will be trapped in the heater. This will cause the limit switch to activate, which shuts down the heating system to prevent an overheating situation. This short-cycling will happen every time the heater turns until the root problem, the dirty air filter, gets fixed.

Your Home Will Have Cold Rooms

A clean air filter helps your system efficiently heat your home. If it’s too dirty there won’t be adequate airflow in your ducts. Rooms near the heater will be heated but not those far away.

The HVAC Specialists To Call

Nacogdoches Sheet Metal, Plumbing & Air Conditioning, LTD. serves the greater Nacogdoches area. We handle projects related to heating service, cooling, plumbing, and sheet metal fabrication. Our company has been helping homeowners since 2010. Over the past decade, we’ve earned a reputation for being reliable. To schedule an appointment, contact us at Nacogdoches Sheet Metal, Plumbing & Air Conditioning, LTD. today.