How often should I vacuum my AC drain line?

Vacuuming your air conditioner condensate drain line with a wet-dry shop vacuum is a fantastic preventative maintenance step that you should ideally perform once or twice a year, typically right before the peak summer cooling season begins and once midway through heavy usage months. Doing this semi-annual vacuuming helps remove minor accumulations of dust, silt, and early-stage algae slime before they have a chance to bond together and form a hard, completely blocked plug that causes your drain pan to overflow. If you live in an exceptionally humid climate where organic growth multiplies at an accelerated rate, or if your system has a history of repeated clogs, you might want to increase the frequency to every three to four months. Combining this mechanical vacuuming routine with monthly preventative chemical flushes using a mixture of warm water and distilled white vinegar will keep your drainage system completely clear and trouble-free.