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Replace HVAC Air Filter & Inspect Vent Grilles

Replace the furnace and AC filter to safeguard air quality and protect system motors from burnout.

Supplies You'll Need

• New replacement HVAC filter (match exact dimensions e.g. 16x25x1)
• Permanent marker

Step-by-Step Instructions

1. Turn off the HVAC thermostat so the blower fan is not actively pulling air.
2. Open the furnace filter slot cover or return air grille.
3. Slide out the old dirty filter and inspect for excessive dust buildup.
4. Note the airflow direction arrow on the new filter. Point the arrow toward the furnace blower unit.
5. Slide the new filter into place, ensuring no gaps along the edges.
6. Write today's date on the filter frame and snap the hatch closed.
7. Turn thermostat back on.