Replace all heater and central airconditioner filters. Wash window air-conditioner filters in the sink, wipe them and reinstall.
Frequency: Every one to three months.
Last updated December 20 2007: 9:44 AM ET
Spring: Rinse and dry Replace all heater and central airconditioner filters. Wash window air-conditioner filters in the sink, wipe them and reinstall. Frequency: Every one to three months. Last updated December 20 2007: 9:44 AM ET
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