Welcome to the new and improved Control Sources, LLC Website. Our web advancements now make it even easier to stay in contact with your number one Automatic Temperature Controls company in Baltimore. Control Sources is now able to receive Service Call requests via this website. We are interested in constant improvement and listening to our customers. We encourage you to tell us what you think of the website, and if you feel something is inadequate, please send us an email, webmaster@controlsources.biz. Have a great day!