Continuously pumps water into drip tray

The issue you’re describing with your Melitta Latte Select continuously pumping water into the drip tray is a common sign of a faulty ceramic valve or a stuck solenoid (controls the flow of liquids or gases) that’s redirecting water incorrectly. This valve controls water flow between the brewing unit, steam wand, and drip tray, and if it’s jammed or misaligned, the machine will keep dumping water. Unfortunately, accessing it requires removing the side panels and internal covers, as the valve is located deep near the pump assembly. Since there are no official repair diagrams publicly available from Melitta, it’s best to contact Melitta support or a certified repair center for service, rather than disassembling it yourself, to avoid damaging the machine.