Thermometer Central stocks thousands of Johnson Controls replacement parts and accessories. There are few companies with the global reach of Johnson Controls. Johnson Controls is a global diversified technology and multi industrial leader serving a wide range of customers in more than 150 countries. From its beginnings in 1885 with the invention of the first electric room thermostat to modern energy solutions, Johnson Controls is committed to helping customers win and creating greater value for through strategic focus on buildings and energy growth platforms.