“Should you use vinegar or bleach to clean your AC drain line? See why bleach is stronger, safer, and more effective for killing mold and algae inside your HVAC system.”

This photo shows thick biofilm and slime that was physically removed from a clogged residential air conditioner condensate drain line during an actual HVAC service call in Florida. Drain line blockages like this can cause water leaks, safety switch shutdowns, and costly water damage if not addressed promptly.