<p>Cleaning a split AC involves regularly cleaning air filters (monthly/bi-monthly) with mild soap and water, gently cleaning evaporator coils and fins with a soft brush or low-pressure water, clearing the drain line to prevent clogs, and keeping the outdoor condenser unit free of debris, with professional deep cleaning recommended annually for coils, fan motor, and electrical components for optimal performance and air quality. Always switch off the power before starting any cleaning to avoid electric shock.&nbsp;</p><p>&nbsp;</p><p><strong>Basic DIY Cleaning (Monthly/Bi-Monthly)</strong></p><ol><li><strong>Safety First:</strong> Turn off power at the breaker.</li><li><strong>Filters:</strong> Slide out filters, dust gently, wash with mild soap/water, rinse, and air dry completely in shade.</li><li><strong>Indoor Unit:</strong> Open panel, gently vacuum/brush dust from behind filters and around the fan/fins; carefully spray fins with water (avoiding electronics/PCB) and let drain.</li><li><strong>Outdoor Unit:</strong> Clear leaves/dirt, vacuum fins gently, ensure good airflow.</li><li><strong>Drain Line:</strong> Check for clogs and flush if needed.&nbsp;</li></ol><p><strong>Deep Cleaning (Professional Recommended)</strong></p><ul><li><strong>Evaporator Coils:</strong> Use specialized coil cleaners and pressure washers.</li><li><strong>Blower Wheel:</strong> Clean thoroughly with a brush and water.</li><li><strong>Condenser Coils:</strong> Clean with pressurized water and chemicals.</li><li><strong>Electricals:</strong> Inspect and clean contactors and connections.</li><li><strong>Refrigerant:</strong> Check levels.&nbsp;</li></ul><p><strong>Tips &amp; Frequency</strong></p><ul><li><strong>Filters:</strong> Clean every 2-4 weeks, or monthly if heavily used in dusty areas.</li><li><strong>Deep Clean:</strong> Annual professional servicing is crucial for long-term efficiency.</li><li><strong>DIY Caution:</strong> Be very careful with water near electronics; consider professional help for deep cleaning to prevent damage.</li></ul>