Baelz WBS 32390 is a compact temperature controller used in industrial HVAC and process automation to regulate heating or cooling loops with integrated sensor input and programmable setpoints. Common failure points for this class of controllers include power supply degradation, board-level component burn‑outs (especially voltage regulators), and firmware corruption leading to loss of communication or incorrect setpoint behavior. Begin troubleshooting by verifying the 24 V DC input and measuring output voltages at key regulator pins; check all I/O connections for continuity and inspect the PCB for visible damage or burnt components; finally review any diagnostic error codes displayed on the panel or logged in the controller’s internal memory.[oss-gpt-20b]