HVAC · low safety risk
Check and change the HVAC filter
Keep airflow healthy and help your system run efficiently.
- How often
- Every 1–3 months
- Time
- 10 minutes
- Difficulty
- Easy
- Editorial status
- Awaiting human review
Before you begin
Tools
- Flashlight
Supplies
- Correctly sized replacement filter
How to do it
- Turn the thermostat and system off.
- Note the airflow arrow, then remove the old filter.
- Match the printed size and install the replacement with the arrow toward the blower.
- Restore power and record the completion date.
Stop and get help when
- Burning odor
- Damaged wiring
- Water near electrical parts
Stop and contact an HVAC professional if the filter cannot be accessed without removing service panels, or if you find damaged wiring, water, heavy ice, or persistent airflow problems.
Sources and review
Written by Upkeeping editorial team. This draft is awaiting human subject-matter and safety review and is not eligible for search indexing.