This electric potentiometer functions as the operator-interface feedback element for the tractor cabin air conditioning system. It converts the rotary position of the temperature control knob into a variable resistance signal that the HVAC controller reads to adjust the blend-air door or compressor cycling. The five-pin connector mates directly with the harness on the control panel, and the mounting-hole spacing matches the panel cutout so no adapter bracket is required. A failed potentiometer typically causes erratic temperature output or a complete loss of cabin cooling adjustment, because the controller no longer receives a valid position signal. As an AGCO original component, the resistive track and wiper are manufactured to the same linearity tolerance as the assembly it replaces, which preserves the temperature curve the controller expects.