Signal Doors, located in Tucson, Arizona since 1971 is a locally owned and operated garage door sales, service, & Installation company Signal Doors believes our customers deserve a quality repair at a fair price. ? Signal Doors is committed to our customers safety in and around the garage door. Every service call includes a 12 point check-up which includes lubricating the door and opener, tightening all the nuts and bolts of the door, checking the spring tension and adjusting if required, checking the cables. We also do a safety revers check to be sure your door is reversing properly. ? All Signal Doors employees are trained by in house technicians and installer no matter how many years of experience they have. Our technicians DO NOT get paid commission to insure only the work needed is done.