Frigidaire appliances use a simplified architecture with limited diagnostic feedback. Most models rely on legacy-style control boards, where fault isolation requires direct testing — thermal fuses, relay output checks, and continuity probes. In refrigerators, defrost issues often stem from timer or sensor failure rather than control logic. Washers and dryers commonly present motor relay faults, belt slippage, or drain pump resistance drops. Ovens and cooktops utilize standard igniter circuits and bimetal thermostats, which are serviceable without proprietary tools. Replacement parts are widely available, and their modular design allows for relatively quick disassembly and repair, often on the first visit.