The Kärcher 66859490 is a genuine OEM temperature controller designed for various Kärcher HDS series hot water high-pressure cleaners. This essential component ensures accurate temperature regulation, optimizing performance and safety. It is compatible with models including HDS 5/11 U, HDS 5/11 UX, HDS 5/12 C, HDS 6/10 C, HDS 6/12 C, HDS 7/16 C, HDS 8/18-4 C, HDS 9/18-4 M, HDS 10/20-4 M, HDS 12/18-4 S, HDS 13/20-4 S, HDS-E 8/16-4 M, and HDS-E 8/16-4 M 36 kW. Weighing 0.05 kg with dimensions of 100 mm length, 100 mm width, and 50 mm height, this controller is a direct replacement part.