Air filters are an essential component of the air conditioner. The filters are in charge of preventing dirt and dust from entering your air conditioner and providing you with clean, healthy air to breathe.
Although, you can only run your air conditioner without a filter for a short time without damaging it. After only 6-8 hours, your AC unit will be in serious trouble.
Without a filter, dust, pollen, and other particles will eventually accumulate inside your system, resulting in a hazardous living or working environment. It can also potentially damage your system over time, necessitating costly repairs or premature AC replacement in Janesville, WI.

Potential Consequences of Running Your Air Conditioner Without a Filter

Damaged Compressor and Motor

Dust and other particles are the most common causes of compressor and motor failure. Contaminants can enter the motor and compressor without being blocked by a good filter, putting pressure on the system’s performance.

Higher Energy Bills

When your AC motor and compressor aren’t working efficiently, your entire system will work harder to keep your home cool. That means your air conditioner will use more energy, resulting in higher energy bills.

Decreased Air Quality

Decreased air quality is one of the most typical problems when running an AC system without a filter.
Air filter captures hazardous particles and keeps them from spreading throughout your home. Without an air filter, indoor air quality would suffer, potentially affecting your family’s health.

Frozen Evaporator Coils

When running your AC unit without a filter, dirt and dust are pushed into the indoor unit and collected on the evaporator coils. This dirt and debris adhere to the evaporator coils holding the refrigerant, making it difficult for the evaporator coils to absorb heat in the system. Because of this inability to absorb heat, condensation will grow excessively cold, causing the evaporator coils to freeze.

Problems With Ductwork

An air filter not only traps particulates and protects your AC, but it also keeps dirt out of your air ducts. Without a filter, these particles are allowed to flow throughout the ductwork and may accumulate inside your ductwork, resulting in insufficient airflow and other serious health issues.

Clogged Condensation Drain

Your condensate drain line can become clogged if there is no air filter to absorb debris. A clogged drain cannot discharge condensed water outside, causing water damage to your AC. If left unchecked for an extended period, this water damage can cause severe damage to your system.


Although an air conditioner without a filter is not ideal, it will still work. However, not having an air filter can result in various issues, including expensive repair expenses and energy expenditures.
Furthermore, a lack of filters in your air conditioner can lead to health issues such as asthma and allergies caused by dirt, dust, or waste particles. To avoid these problems, always run your air conditioner with a filter.
If you are looking for AC service in Janesville, WI, contact Arch Heating & Cooling Inc for help. Call us at (608) 362-4090 or email us for additional information about air filters and tips to maintain your air conditioner.