5 Signs of a Clogged AC Filter and the Risks It May Pose

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Clogged AC Filter
Mature man examining an outflow air vent grid and duct to see if it needs cleaning. One guy looking into a home air duct to see how clean and healthy it is.

Last Updated on February 15, 2024 by Nasir Hanif

Did you know that most homeowners pay between $166 and $598 to repair their AC units? You might not be aware that a clogged AC filter can have negative health repercussions, and it can cost you more. We have put together this short guide to share the top signs of a clogged AC filter. 

Keep reading to learn the ins and outs of a dirty AC filter. 

1. You Don’t Remember the Last Time You Changed It

If you had no idea when the last time you changed your AC filter was, then it is probably time to replace the filter before it causes AC problems that lead to needing an AC repair. Remember that even a small amount of dust or dirt will force your air conditioner to run longer. 

It is best to check your filter every month and replace it as soon as you notice dirt. 

2. Sudden High Energy Bill

If you notice a sudden spike in your electric bill, then this is a sign of a clogged filter. When the filter is clogged, it will interfere with the normal airflow in the air conditioning system. This will also allow dirt to accumulate on the coils and will make your unit work overtime to keep your home cool. 

A clean filter will ensure that your unit does not have to work harder, which in turn, will lower your electric bill. 

3. Dusty Air Vents

Whenever you notice any dust around or on the vents, you will likely need to change your AC filter. Take a look at other areas in your home, and if you notice that most of the dust is near your vents, then you are probably overdue on a filter change. 

4. Overheating

If your unit starts to overheat, then you want to change the filter out as soon as possible. Whenever your AC unit has to work harder, it risks becoming too hot and overheating. If the system suddenly shuts down or cycles off and on too frequently, then you are dealing with an overheating issue that you do not want to ignore.

5. Frozen Evaporator Coils

Another sign of a clogged AC filter is frozen cooling coils. When there is not enough air moving past the coil to make the condensation disappear, it will cause it to freeze up instead. The lack of proper airflow that causes the condensation to freeze will reduce the ability for the AC unit to remove the heat from the air. 

The chances of your air conditioner breaking down from frozen coils are high. 

A Quick Overview

Air conditioners are a great relief during hot summers, but with constant use, their filters can become clogged with dirt and debris. A clogged AC filter may seem like a minor issue, but it can pose serious risks to both your health and your HVAC system. In this paragraph, we will discuss the dangers of a clogged AC filter and how to avoid them.

Risk to Health: A clogged AC filter can reduce air quality inside your home or office. The filter’s primary function is to trap dust, debris, and allergens from the air, which can reduce the air’s quality. When the filter becomes clogged, it can no longer do its job properly, leading to poor indoor air quality, triggering allergies, respiratory problems, and even asthma attacks.

Risk to HVAC System: A clogged AC filter can also cause damage to your HVAC system. When the filter is clogged, it restricts airflow, causing the unit to work harder to circulate air throughout your home. This strains your HVAC system and can cause it to break down. A malfunctioning AC unit not only leads to discomfort but also increases energy bills and expensive repair costs.

Prevention: To prevent these risks, it’s essential to clean or replace your AC filter regularly. A clean filter improves the air quality in your home, reduces energy consumption, and helps your HVAC system operate efficiently. Ideally, you should replace your filter every 30-60 days, depending on usage.

Say Goodbye to a Clogged AC Filter 

We hope that now that you know the top signs of a clogged AC filter, you can make an informed decision on whether it is time to clean your filter or replace it. 

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Apart from this, if you want to know about Why Buy Your Air Filters From A Reputable Supplier then please visit our Home Improvement category