HPLC Column Oven Won’t Cool Below Ambient? A Step-by-Step Peltier Diagnostic Guide
When a Peltier-cooled HPLC column oven — like the Shimadzu CTO-20AC or CTO-40 series — stops cooling below ambient temperature, the fault almost always lives in one of three places: the heatsink fan, the driver board, or the Peltier module…