How to Clean and Replace Furnace Filters

Regularly cleaning or replacing your furnace filters is essential for maintaining your heating system’s efficiency and ensuring good indoor air quality. Filters trap dust, dirt, and allergens, preventing them from circulating through your home. Here’s a step-by-step guide to keep your furnace in top shape.

Why It’s Important to Maintain Furnace Filters

• Improved Efficiency: Clean filters allow air to flow freely, reducing strain on the furnace.
• Lower Energy Bills: A well-maintained filter ensures your system uses less energy.
• Better Air Quality: Trapping dust, allergens, and other particles keeps your home’s air cleaner.
• Prolonged System Life: Prevents dust buildup that can damage internal components.

How Often Should You Clean or Replace Filters?

• Disposable Filters: Replace every 1-3 months, depending on usage and filter type.
• Reusable Filters: Clean monthly during peak heating season.
• Check Frequency: If you have pets, allergies, or live in a dusty environment, check filters more often.

How to Check Your Furnace Filter

1. Turn Off the Furnace:
   • Switch off the furnace at the thermostat and, for added safety, at the breaker.
2. Locate the Filter:
   • Most filters are found behind the furnace door, inside the blower compartment, or in the return air vent.
3. Inspect the Filter:
   • Hold the filter up to a light source. If you can’t see light through it, it’s time to clean or replace it.

How to Replace Disposable Filters

1. Remove the Old Filter:
   • Slide the filter out carefully to avoid spreading dust.
2. Check Filter Size:
   • Note the dimensions printed on the edge of the filter to ensure you buy the correct replacement.
3. Insert the New Filter:
   • Ensure the arrow on the filter frame points toward the furnace or airflow direction.
   • Slide the filter securely into place.
4. Restart the Furnace:
   • Turn the furnace back on and check that it’s running smoothly.

How to Clean Reusable Filters

1. Remove the Filter:
   • Follow the same steps as removing a disposable filter.
2. Vacuum the Filter:
   • Use a vacuum cleaner with a brush attachment to remove loose debris.
3. Wash the Filter:
   • Rinse the filter under lukewarm water until the water runs clear.
   • Avoid using harsh detergents that could damage the filter material.
4. Dry Completely:
   • Let the filter air dry completely before reinstalling it to prevent mold growth.
5. Reinstall the Filter:
   • Follow the same steps for inserting a new filter.

Common Mistakes to Avoid

• Skipping Maintenance: Forgetting to clean or replace filters can lead to higher energy bills and potential furnace damage.
• Using the Wrong Filter: Always check the size and type recommended for your system.
• Reinstalling a Wet Filter: Ensure reusable filters are completely dry to avoid mold and mildew.

When to Call a Professional

• If you’re unsure how to access or replace your filter.
• If the furnace continues to perform poorly after filter maintenance.
• For annual furnace tune-ups and deeper cleaning needs.

Final Thoughts

Cleaning or replacing your furnace filters is a simple task that can have a big impact on your home’s comfort and energy efficiency. By maintaining your filters, you’ll enjoy cleaner air, lower bills, and a longer-lasting heating system. If you’re not comfortable doing it yourself or need professional help, contact Colin Can Help to ensure your furnace is ready for the season.