The answer to 'ductless system freezing up' is that a frozen ductless air conditioner or heat pump is a common issue caused by restricted airflow, low refrigerant levels, or a mechanical problem. Symptoms include ice buildup on the indoor unit, reduced cooling or heating output, and poor air circulation. Solutions can include cleaning the air filter, adjusting the thermostat, or checking the refrigerant charge, but more complex issues may require a professional HVAC technician to diagnose and repair.
Ductless systems are generally easy to maintain, but dealing with a frozen unit is best left to the experts unless you have HVAC experience. Attempting DIY repairs on a frozen system could potentially cause further damage. If you notice your ductless unit is freezing up, it's recommended to shut it off and call a qualified HVAC technician to inspect and resolve the problem.