The term 'thermostat component' refers to a device that is used to regulate temperature. The crossword solutions for this term are 'SENSOR, ' which is a six-letter word. A SENSOR is a device that detects and responds to changes in the environment, such as temperature, pressure, or motion. In the case of a thermostat component, the SENSOR would detect changes in temperature and then send a signal to the thermostat to adjust the temperature accordingly.