The present disclosure refers to methods and electronics used to test immersion cooling controllers. A representative method comprises operably connecting a simulator device to an immersion cooling controller. The simulator device is used to communicate one or more changes to the immersion cooling controller wherein the one or more changes relate to one or more sensed parameters of an immersion cooling system. The reaction of the controller to the one or more changes is compared to an expected reaction of the controller to determine whether the controller is functioning properly. The controller may be configured to control any parameter of an immersion cooling system including, but not limited to, temperature, water flow, pressure, fluid level, fluid purity, and any combination thereof.