Abstract: A thermostat replacement system includes a handheld user computing device having an image capture device. The handheld user computing device is configured to communicate to a network. Thermostat replacement system also includes a server computing device communicatively coupled to the network. The server computing device includes an image analyzer configured to identify image elements in an image captured by the handheld user computing device, and a machine learning algorithm that includes an image elements table of correspondence of learned thermostat configurations. The server computing device also includes a configurator configured to determine a wirelist for connecting existing thermostat wires to a replacement thermostat back plate using a replacement thermostat identification and the image elements table of correspondence.