Replace the Furnace Filter

What happens here

Before swapping out the filter, it is essential to turn off your furnace or HVAC system to prevent dust from entering the system during the exchange and to avoid any operational hazards. The speaker notes, 'I turn it off when I'm actually spraying,' but the heating system must be on due to the cold weather. Locate the filter slot (often in the return air duct or within the furnace unit itself), remove the old filter, and carefully slide the new filter into place, ensuring the airflow arrow on the filter points in the direction of the furnace.

Goal: Exchange the old, clogged filter with a new one.