The answer to 'ductless system making noise' is that a ductless HVAC system can make noise for a variety of reasons, such as a loose mounting, refrigerant issues, or problems with the compressor or fan. Common symptoms include rattling, humming, or clicking sounds. To troubleshoot, first check for any loose components and tighten them. If the noise persists, you may need to call in a professional HVAC technician to diagnose and repair the issue.
Ductless systems are generally reliable, but they do require regular maintenance and occasional repairs. While some minor troubleshooting can be done DIY, it's best to have a licensed HVAC technician inspect and service the system to ensure it's operating safely and efficiently.