Customer Questions and Answers for Microwave Charcoal Filter by Bosch

This is a charcoal filter used in over-the-range microwaves to remove odors and smoke when the microwave is set to recirculate air rather than vent outside. The filter traps grease and odor particles from cooking fumes. Replace it if you notice persistent cooking odors, reduced air filtration performance, or if the filter appears visibly saturated or discolored.