Essential Maintenance Tasks for Ductless Mini Splits
Maintaining a mini split system requires regular cleaning and inspection to ensure efficient operation and prevent potential problems. The process involves several key steps. Firstly, cleaning the filters is crucial. Over time, air filters can become clogged with dust, pet hair, pollen, and other debris, reducing airflow and forcing the unit to work harder. To clean them, simply slide out the mesh filter from its frame, rinse it with warm water, and use a mild detergent if it's very dirty. After rinsing, let the filter air dry completely before reinstalling it. Disposable pleated filters should be replaced approximately every three months. In addition to filter maintenance, the indoor and outdoor units of the mini split system need attention. Dust accumulation on the indoor unit can hamper performance, while outdoor units may collect leaves, grass clippings, and exterior debris. Clean these units by using a soft brush attachment on a vacuum cleaner to remove light dust from all intake and outlet vents. Then, wipe down surfaces with a microfiber cloth, warm water, and mild detergent. The outdoor unit can be gently sprayed down with a garden hose on a low setting every few months.
Apart from cleaning, the system's refrigerant levels and electrical connections should be inspected annually. Signs of low refrigerant include reduced heating or cooling capabilities, inability to reach set temperatures, unusual noises from the outdoor compressor, and frost or ice buildup on refrigerant lines. An HVAC technician should check the refrigerant levels and top them off if needed. For electrical connections, it's important to ensure that all control wiring and power connections are intact and corrosion-free. An electrician should annually check the wiring, connectors, electrical control board, and compressor power wiring. Any damaged wires or loose connections, which can cause shorts and compressor failure, must be addressed immediately.