performanceheatingairllc-333948-c9c36460

How Often Should I Change My Air Filter?

Thu, 13 Aug 2026 16:36:10 GMT

How Often Should I Change My Air Filter?

Your HVAC air filter is one of the smallest and least expensive parts of your heating and cooling system, but it plays a pretty important role. At Performance Heating & Air , one of the things we talk about with homeowners all the time is how often they should actually be changing their filter.

The short answer? It depends on your home and the type of filter you're using.

A good rule of thumb is to check your filter about once a month . You may not need to replace it every month, but checking it regularly lets you catch a dirty filter before it starts causing problems.

Why Is Changing Your Air Filter Important?

Your filter catches dust, dirt, pet hair, and other particles before they make their way through your HVAC system.

When the filter gets packed with debris, it can restrict airflow. Your system then has to work harder to move air throughout your home.

A dirty filter can contribute to:

Reduced airflow from your vents
Longer heating and cooling cycles
Reduced comfort
Higher energy use
A frozen evaporator coil
Additional stress on your HVAC system

Something as simple as changing your filter regularly can go a long way toward helping your system operate properly.

How Often Should You Actually Change It?

There's no single schedule that works for every home.

Here are some general guidelines:

Every 1–3 Months

This is a common range for many standard disposable filters.

If you have a home without pets and don't have significant indoor air-quality concerns, you may be able to go closer to the three-month mark.

Every 1–2 Months

If you have pets, your filter may collect hair and dander much faster.

Homes with multiple pets may need even more frequent filter changes.

Every Month

If someone in your household has allergies or you notice your filter getting dirty quickly, checking and changing it monthly may be a better approach.

The important thing isn't necessarily the calendar— it's the condition of the filter.

What Does a Dirty Filter Look Like?

This is something you can easily check yourself.

Take the filter out and look at it under good lighting. If it's covered in dust and debris or you can barely see the filter material, it's probably time for a replacement.

When in doubt, replacing an inexpensive filter is usually better than letting a severely clogged filter restrict your system's airflow.

Can a Dirty Filter Cause My AC to Freeze?

Yes, it can.

This is something we see during service calls.

When airflow becomes restricted, the evaporator coil may get too cold and freeze. Once that happens, your AC won't be able to properly remove heat from your home.

You may notice:

Ice on the indoor unit or refrigerant lines
Weak airflow from the vents
Warm air coming from the vents
The system running for long periods

If you notice ice, turn the system off and allow it to thaw. If the problem continues, it's a good idea to have the system inspected.

Does a More Expensive Filter Mean a Better Filter?

Not necessarily.

It's easy to assume that the highest-rated filter is automatically the best choice for your HVAC system, but that's not always the case.

Some very restrictive filters can reduce airflow if your HVAC system isn't designed to handle them.

That's why we recommend using the filter type and efficiency rating appropriate for your particular system. If you're unsure what your system needs, we're happy to help you figure it out.

Don't Forget About Your Filter During Maintenance

Changing your filter is one of the easiest things a homeowner can do to help take care of their HVAC system, but it's only one piece of the puzzle.

During a professional maintenance visit, we look at the system as a whole to make sure it's operating properly and catch potential problems before they turn into unexpected breakdowns.

At Performance Heating & Air , we also offer maintenance customers 10% off repairs found during their maintenance visit , along with priority service and a waived service fee when a part is needed .

Our goal isn't just to fix your system when something breaks. We want to help you keep it running reliably.

One Simple HVAC Habit Can Make a Big Difference

If you can't remember the last time you checked your air filter, this is your reminder to take a look.

Set a reminder on your phone to check it once a month. If it's dirty, replace it. If it still looks clean, check it again next month.

It's a small thing, but keeping up with your filter can help your HVAC system maintain proper airflow and keep your home comfortable.

Need Help With Your HVAC System?

If you're changing filters regularly but your system still isn't cooling or heating properly, there may be another issue going on.

Performance Heating & Air proudly serves homeowners throughout Louisville, Shepherdsville, Mount Washington, Middletown, Prospect, and surrounding Kentucky communities .

If something doesn't seem right with your HVAC system, give us a call. We'll take a look, explain what we find, and help you understand your options.

Performance Heating & Air — Quality you can count on.

P.S. — Know Someone Who Needs HVAC Help?

We love when our customers send their friends, family, and neighbors our way.

If you have a friend, family member, neighbor, or coworker who needs HVAC service, repair, maintenance, or a new system , send them our way!

Our referral program is one of the ways we like to say thank you to the customers who help spread the word about our small business.

Know someone who needs a trustworthy HVAC company? Send them to Performance Heating & Air!

We truly appreciate every referral and every customer who chooses to support our local business.

Thank you for trusting Performance Heating & Air!

Why Isn't My AC Cooling?

Wed, 05 Aug 2026 16:14:34 GMT

Why Isn't My AC Cooling?

When your air conditioner stops keeping your home cool, it can be stressful—especially during a Kentucky summer. At Performance Heating & Air , we know how important it is to get your home comfortable again as quickly as possible.

The good news is that not every cooling issue means you need a new system. Many problems have simple solutions, while others can be repaired before they turn into something more expensive.

Here are the most common reasons we see when homeowners call us because their AC isn't cooling.

1. Start with Your Thermostat

It may seem simple, but you'd be surprised how often a thermostat setting is the culprit.

Before calling for service, make sure:

Your thermostat is set to Cool
The fan is set to Auto
The temperature is set lower than the current room temperature
The batteries (if applicable) are still good

If everything looks right and your home still isn't cooling, it's time to look a little deeper.

2. Check Your Air Filter

One of the easiest ways to keep your HVAC system running efficiently is by replacing your air filter regularly.

A dirty filter restricts airflow, forcing your system to work harder than it should. We've seen clogged filters lead to frozen coils, higher energy bills, and even premature system failures.

As a general rule, check your filter every month and replace it every one to three months depending on your home, pets, and lifestyle.

3. Take a Look at Your Outdoor Unit

Your outdoor condenser needs plenty of airflow to do its job.

If it's covered with leaves, grass clippings, weeds, or dirt, your system won't be able to release heat efficiently.

Keeping the area around your unit clean and allowing at least two feet of open space can make a noticeable difference.

4. Low Refrigerant Could Be the Problem

Many people think refrigerant gets "used up," but that's actually a common misconception.

If your system is low on refrigerant, it almost always means there's a leak somewhere.

Some warning signs include:

Warm air from your vents
Ice on the refrigerant lines
Longer cooling cycles
Higher electric bills

At Performance Heating & Air, we don't believe in simply adding refrigerant and sending you on your way. We find the source of the leak, explain your options, and repair the problem the right way whenever possible.

5. Regular Maintenance Makes a Difference

One of the best ways to avoid unexpected breakdowns is with routine maintenance.

During our maintenance visits, we inspect your entire system, clean critical components, check refrigerant pressures, test electrical parts, verify airflow, and make sure everything is operating safely and efficiently.

We also offer:

10% off any repairs found during your maintenance visit.
Priority service for maintenance customers.

A waived diagnostic fee if your system needs a repair that requires a replacement part.

Our goal is to help you catch small issues before they become expensive ones.

When Should You Call Performance Heating & Air?

If you've checked your thermostat, replaced your air filter, and your AC still isn't keeping your home comfortable, don't wait for the problem to get worse.

At Performance Heating & Air, we're proud to serve homeowners throughout Louisville, Shepherdsville, Mount Washington, Middletown, Prospect, and the surrounding Kentucky communities. We treat every home like it's our own by providing honest advice, quality workmanship, and repairs you can trust.

Whether your system needs a quick repair, seasonal maintenance, or you're considering a replacement, we're here to help you make the right decision—not the most expensive one.

performanceheatingairllc-333948-c9c36460

How Often Should I Change My Air Filter?

How Often Should I Change My Air Filter?

Why Is Changing Your Air Filter Important?

How Often Should You Actually Change It?

Every 1–3 Months

Every 1–2 Months

Every Month

What Does a Dirty Filter Look Like?

Can a Dirty Filter Cause My AC to Freeze?

Does a More Expensive Filter Mean a Better Filter?

Don't Forget About Your Filter During Maintenance

One Simple HVAC Habit Can Make a Big Difference

Need Help With Your HVAC System?

P.S. — Know Someone Who Needs HVAC Help?

Why Isn't My AC Cooling?

Why Isn't My AC Cooling?

1. Start with Your Thermostat

2. Check Your Air Filter

3. Take a Look at Your Outdoor Unit

4. Low Refrigerant Could Be the Problem

5. Regular Maintenance Makes a Difference

When Should You Call Performance Heating & Air?

Quality you can count on ﻿

Quality you can count on