How to Replace a Heat Pump Filter

Heat pump air filters should be changed regularly to maintain airflow, efficiency, and indoor air quality.

Air filters are an important part of a heat pump system. They remove dust and airborne particles before conditioned air is returned to your rooms.

Over time, filters become clogged with dust and debris. When that happens, they restrict airflow and reduce system efficiency.

By replacing or cleaning filters regularly, you help your heat pump run more efficiently and last longer.

Why Filters Matter

• Improve airflow
• Protect system components
• Reduce dust and allergens
• Maintain heating and cooling performance

Where Filters Are Located

Filters may be located:

• At return-air registers
• Inside the air handler cabinet
• In both locations

Replace disposable filters or clean permanent ones at least every six months—or sooner if they become dirty.

To Replace a Filter at a Return-Air Register

The return-air register is usually larger than supply registers and is often located in a hallway wall or ceiling.

1. Open the register grille

Unlatch or remove the grille carefully.

2. Remove the old filter

Take out the filter and dispose of it if it’s disposable. Clean dust from the grille and surrounding surfaces.

3. Insert the new filter

Position the replacement filter with airflow arrows pointing toward the ductwork.

4. Replace the grille

Close and latch the grille securely.

To Replace the Filter in the Air Handler

1. Turn off the power

2. Remove the access panel

3. Slide out the filter

4. Install the new filter

How Often to Replace Filters

• At least every 6 months
• More often with pets, dust, or allergies
• Check monthly during heavy-use seasons

Tip: Always use the correct filter size and make sure the airflow arrow points in the proper direction.

Watch: How to Change a Heat Pump Filter

For a quick look at changing a furnace or heat pump filter, watch this short video by Don:

Watch this video on TikTok