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DIY Troubleshooting Guide
How to Change Your HVAC Air Filter
Properly swapping your air filter improves air quality, protects equipment, and lowers utility bills.
DifficultyEasy
Est. Time⏱️ 5 minutes
SuppliesCorrect sized HVAC filter
1
1Step
Locate Your Filter Slot
The filter is usually located behind the return air grille on a wall/ceiling, or directly slotted into the indoor furnace/air handler unit in a closet or attic.
2
2Step
Note the Airflow Direction
Look for the printed arrow on the edge of the old filter showing airflow direction. It should always point TOWARD the HVAC unit, not away from it.
3
3Step
Slide in the New Filter
Carefully remove the old filter and slide in the new one, ensuring the airflow arrow matches the correct direction and the filter sits completely flush without gaps.
Still experiencing issues?
If you completed the DIY steps and your system is still not functioning properly, it may require a professional diagnosis.
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