The Jelrus Wizard 25041 is an industrial electronic porcelain furnace used primarily in jewelry‑making and dental laboratories for metal melting and casting. Common failure modes on this model include power supply malfunction (especially the transformer or rectifier), heating element burnout, thermocouple failure, and control board faults such as a defective CPU circuit or relay driver. Initial checks should verify that the unit receives proper 110 V/220 V input, inspect the main power supply and rectifier for continuity and voltage output, examine the heating element and thermocouple for open circuits or excessive resistance, and review any error codes displayed on the control panel before proceeding to board diagnostics.[oss-gpt-20b]