Also, don't forget to flush the AC drip line monthly. I use a gallon of warm water & 1/4 cup regular white vinegar. It goes down the PVC pipe next to the AC unit (in garage or in house) and flows outside to the drip pipe.
I also have a washable, permanent air filter for my AC unit and I clean that with a garden hose every 2 or 3 months. More often if you have pets that shed a lot of hair.
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