Ductless mini-split systems can experience several common issues over their operational lifespan, starting with clogged air filters or dirty indoor blower wheels that restrict airflow and reduce heating or cooling efficiency. Another frequent problem involves blocked or improperly sloped condensate drainage lines, which can lead to water leaks spilling down indoor walls. Electrical communication errors between the indoor air handler and outdoor condenser unit can also occur due to power surges or damaged control wiring. Additionally, refrigerant leaks at flare connections or low refrigerant charges will cause the system to struggle with temperature regulation, requiring professional diagnostic service and repair.
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