Wednesday, September 16, 2026 Water pooling around your indoor AC unit, musty odors, or an air conditioner that suddenly shuts off can all point to a clogged AC drain line. The condensate drain line carries moisture away from your cooling system, but dust, dirt, sludge, mold, and other buildup can restrict that flow. When the line becomes blocked, water can back up into the drain pan, interfere with normal AC operation, and eventually leak into surrounding areas of your home.
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