This switch controls the operation of the cooling fan within the tractor's electrical system. It is installed in the fan circuit and responds to a temperature or pressure signal to engage or disengage the fan motor. When the switch fails, the fan may run continuously or not at all, leading to improper engine or hydraulic system temperature regulation. This component is manufactured by AGCO and matches the original switch's electrical ratings and connector geometry, so it plugs directly into the existing harness without rewiring.