How to change your heat pump air filter
A clean air filter is the easiest thing you can do to keep your heat pump running at peak efficiency. A clogged filter forces the system to work harder, raises energy bills, and accelerates wear on the blower motor.
What you'll learn
- How to locate your filter and access the return vent
- How to choose the right MERV rating for San Diego air quality
- How often to replace the filter in coastal vs. inland homes
Step by step
- Turn the system off. Switch the thermostat to OFF before opening the filter slot. This prevents dust from being pulled into the system while you work.
- Find the return air vent. Most heat pump systems pull return air through a large vent in the hallway ceiling or wall. Some air handlers have a filter slot directly on the unit itself.
- Note the filter size and direction. Pull the old filter out and check the size printed on the frame. Also note the airflow arrow on the frame so you can install the new one in the correct direction.
- Install the new filter. Slide the new filter in with the arrow pointing toward the air handler (in the direction air flows). Make sure it sits flush with no gaps around the edges.
- Dispose of the old filter and restart. Bag the old filter before carrying it through the house. Replace the vent cover, switch the thermostat back to your normal setting, and mark your calendar for the next change.
In San Diego coastal neighborhoods, salt air and marine layer can load filters faster than inland areas. Check monthly during the May-through-July overcast season.
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