A range hood collects cooking grease whether it is vented outdoors or
recirculates air through a filter. When the metal screen gets sticky,
airflow can fall and grease can collect around the fan. I suggest
learning which arrangement is in your kitchen before ordering
replacement filters.
Remove an accessible grease filter according to the hood manual and
clean it with the approved method. Let it dry before reinstalling it.
Some recirculating units also use a charcoal filter that needs
replacement rather than washing. Check the fan’s different speeds and
listen for a new rattle. If the hood vents outside, observe the
termination from safe ground when it runs, but don’t reach into a duct
or dismantle wiring.
A hood that barely draws air after filter service, leaks grease, or
has a blocked exterior flap merits qualified appliance or ventilation
service. Cleaning a filter won’t make a recirculating hood exhaust
combustion byproducts outdoors. If you have a gas range, follow the
appliance and ventilation instructions, and keep CO alarms maintained
separately.
Write the filter part number inside your appliance records;
replacements often look similar but fit differently. Local appliance and
ventilation contacts are on my Helpful
Resources page. The Homeowner
Tools & Supplies guide has basic upkeep gear; match any filter
to the actual model.