Carrier HVAC ProductsHow To Change Your Home’s Heating And Air Conditioning Filter

4 steps to ensure that your air conditioning and heating system are operating efficiently.

Consistent maintenance of your home’s heating, ventilation and air conditioning system (HVAC) is essential to ensuring its long life and efficient operation. Proper upkeep of this system can help keep you warm or cool during extreme temperatures and may also help you save a little money on your utility bill.

What Do I Need to Do?

The HVAC system heats your home during the winter months and cools your home during the hot summer. There are numerous different types of air filters that exist on the market and each one offers different benefits. But no matter which one you choose, the air filters in your home still need to be inspected, maintained and periodically changed in order to function safely and effectively.

Why Do I Need to Do It?

The air filter in your home keeps debris and pollution out of your HVAC system, safeguarding its proper and efficient operation. A dirty filter will decrease air flow, which makes both the furnace and the air conditioner work harder to heat or cool your home. This not only wastes energy, but can result in higher energy bills.

How Often Do I Need to Do It?

According to, the filters in your home need to be checked every month and changed every three months, depending on the type of unit you have. Check the filter information for the manufacturer’s suggested frequency of change.

Depending on what time of year it is, where you live and how much you use your air conditioner or heater, you may have to replace your air filter more frequently.

How to Change an HVAC Air Filter:

The following 4 steps will walk you through changing your home’s heating and air conditioning filter. Make sure before you begin to read your HVAC system’s manufacturer instructions to ensure you understand how to properly change the filter.

Purchase a new air filter

Before you head out to buy a new air filter, check the owner’s manual on your unit to identify the correct size or product number. You can purchase a replacement filter at a hardware store.

Turn the unit off

As a safety precaution, make sure the HVAC unit is turned before changing the filter. If you are unable to turn the unit itself off make sure to turn off the breaker.

Remove the old filter

Many air filters are located on the right side of the HVAC unit. Locate the filter and gently slide it out of its slot in the HVAC unit. It’s not a common feature, but occasionally air filters are found in the air vents of your home. If this is the case, you will likely need to contact a professional to change the filter.

Insert new filter

Simply slide the new filter into the same spot from where you pulled the old one out. Most filters should have arrows or some sort of directional guide to indicate which side should be facing the outside air.

A congested air filter can cause extensive damage to your HVAC unit. It is important to check your air filter’s condition regularly to ensure the longevity of your system and in the long run, saving thousands of dollars in repair and/or replacement costs. Dirt buildup and lack of care are one of the leading causes of heating and cooling system failures.

Have a clogged air filter or is your air conditioner not working properly? Contact MM Comfort throughout the Seattle area to help with your Heating and Cooling needs.

MM Comfort experts can help you with repairs and servicing of your current HVAC system or help you choose the best heating and cooling options for your home, no matter how big or small it may be. Call us at 425.533.9058, or use our online contact form to arrange for a free heating and cooling consultation.


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