What are some common issues that can arise with HVAC drain lines and how can they be prevented or resolved?

Common issues with HVAC drain lines include clogs, leaks, and mold growth. These issues can be prevented by regularly cleaning and maintaining the drain lines, ensuring proper installation, and using a condensate pump if needed. If issues arise, they can be resolved by clearing clogs with a wet/dry vacuum or plumber's snake, repairing leaks, and treating mold with a biocide. Regular maintenance and prompt attention to issues can help prevent costly repairs and ensure efficient operation of the HVAC system.