What are the common signs and solutions for a clogged condensate drain in an air conditioning system?

Common signs of a clogged condensate drain in an air conditioning system include water leaks around the unit, musty odors, and reduced cooling efficiency. Solutions for a clogged condensate drain include using a wet/dry vacuum to clear the blockage, flushing the drain line with a mixture of water and vinegar, or contacting a professional HVAC technician for assistance.