Air conditioner repair starts with the basics: clean or replace the filter monthly. Clogged condensate drains cause indoor leaks—flush the drain line with vinegar. A failing capacitor often prevents the compressor or fan from starting—test and replace it. Refrigerant leaks require a professional. Our guides cover window units, portable ACs, and split systems from LG, Samsung, Daikin, and Carrier. Always disconnect power. Capacitors hold charge—discharge before handling. Proper maintenance can add years to your AC's life.