6 Telltale Signs It's Time to Replace Your AC Filter

Many homeowners don't think much about their home's air conditioning system. As a result, they even forget to do simple air conditioner maintenance tasks like changing the air filters. A dirty, clogged, or damaged air filter is a source of air quality problems and can compromise your health. Here are six signs you need to replace your air conditioner filter. 

When an air filter clogs, it releases dust and dirt into the system. Most of the dust will settle near the air vents. For instance, confirm whether the air filter is to blame through the 'white sheet test.' Hang a clean white sheet a few inches away from an air vent for a few minutes. If the sheet turns gray, the air filter is dirty and it's time to replace it.

Keep in mind that dust around the air vents may also indicate a clog in the ducts. If the sheet in the 'white sheet test' doesn't turn gray, you should check the ducts. 

A burning smell emanating from your air conditioner system could signify a blockage in the air filter. In most cases, the smell occurs when dirt mixes up with the heat coming from the system. Sometimes, the smell is a result of the accumulation of mold or mildew in the air filter. Either way, don't ignore strange smells from your system, as they often point to an air filter that is due for a change. 

While a hike in electricity bills can have multiple causes, including a faulty appliance or additional electric gadgets in your home, the air filter may also be to blame. When the air filters are dirty, your air conditioner has to work harder to maintain your ideal indoor temperatures. In the process, the demand for electricity increases, causing a spike in utility costs. After a filter replacement, your energy bills should go back to normal.

If the back of your air conditioner unit is too hot, the system could be trying too hard to push air through the filter. This often happens when the filter has a clog. If left unattended, this issue can lead to a total system breakdown. Replace the air filter as soon as possible, so you don't have to spend money on a new air conditioner unit.   

The air filters remove dust, pollen, pet dander, and other harmful contaminants from the air. When your filter gets dirty, it cannot properly filter out these pollutants, so they remain in the air inside your home. 



As you and your loved ones breathe in this air, you may develop allergic symptoms such as coughing, sneezing, and red or itchy eyes. People with respiratory conditions such as asthma and COPD could even have worse reactions. 

Failure to replace your air filter on time can cause deeper problems with your air conditioner unit. Your air conditioner may start to blow warm or hot air, make strange noises, or produce unpleasant odors. Even worse, a damaged air filter can cause permanent damage to your air conditioning system. Changing the air filters isn't only essential for improving indoor quality, but also for enhancing the efficiency and lifespan of your AC unit. 

Whether you need to purchase a replacement filter, need help with air filter cleaning, or need help getting to the bottom of the cause of your HVAC problems, don't hesitate to call our HVAC specialists at Central York Corp. Having served for years in the HVAC industry, you can rely on us for exceptional products and services.