What is the definition of a minisplit thermostat? A minisplit thermostat is a device used to control the temperature of a space or a system. It is typically used in a mini-split air conditioning and heating system, which is a type of ductless system that separates the outdoor condensing unit from the indoor air handling unit. A minisplit thermostat has two main parts – a display unit and a control unit. The display unit is typically located indoors while the control unit is located outdoors. The display unit is used to set the desired temperature and to monitor the temperature of the room or system. The control unit is connected to the display unit and can sense the temperature in the room or system and then adjust the temperature accordingly. It also has the ability to control the fan speed, system settings, and other settings. Minisplit thermostats are available in both digital and analog models and can be programmed according to a user