American Farm Works 50‑B is a low‑impedance electric fence charger designed to energize up to 60 miles of fencing from an AC source. Common failure modes on this class of chargers include internal transformer or rectifier burnout, capacitor degradation, and overheating of the charging coil due to high load impedance or excessive vegetation contact. Typical symptoms are intermittent shock delivery, a drop in output voltage below rated levels, or a “no charge” indication on the control panel. First‑check diagnostics: verify 120 V AC input is present and within tolerance; inspect the internal fuse and rectifier diodes for continuity; visually examine the charging coil and capacitor bank for signs of burn or corrosion, and review any error codes displayed on the unit’s LED panel.[oss-gpt-20b]