Garage Door Parts Glossary & Terminology

Understanding your garage door system helps you identify problems faster. This comprehensive glossary defines all major garage door parts for homeowners in Jonesboro AR and Craighead County.

What is a Garage Door Torsion Spring?

A torsion spring is a heavy-duty spring mounted on a metal shaft directly above the closed garage door. It stores mechanical energy by twisting (torsion) and provides the primary lifting power to raise the door. Torsion springs are the most common spring system used in modern homes across Northeast Arkansas. They typically last 10,000 to 15,000 cycles. If your door feels incredibly heavy or you hear a loud bang, you likely need spring repair.

What are Garage Door Extension Springs?

Extension springs are long, lighter-weight springs installed along the upper horizontal tracks on both sides of the garage door. They stretch (extend) to provide lifting power as the door closes. These are typically found on older homes or single-car garage doors in Jonesboro AR. Because they stretch under extreme tension, they must always be installed with safety cables to prevent injury if they snap.

What are Garage Door Cables?

Garage door cables are braided steel wires that attach the bottom bracket of the door to the cable drums (for torsion springs) or the pulley system (for extension springs). The cables bear the actual weight of the door as it lifts and lowers. If a cable frays or snaps, the door will hang crooked or become stuck. You will need professional cable replacement to safely fix the issue.

What is a Garage Door Logic Board?

The logic board (or circuit board) is the computer brain inside your garage door opener motor housing. It receives radio signals from your remotes and keypad, and wired signals from your wall button and safety sensors. Power surges from Arkansas thunderstorms can often fry logic boards. If your remotes stop working but the wall button works, or the opener acts erratically, you may need opener repair to replace the board.

What are Photo Eye Safety Sensors?

Photo eye sensors are small electronic devices mounted about 6 inches off the floor on either side of the garage door tracks. They shoot an invisible infrared beam across the opening. If the beam is broken by a person, pet, or object while the door is closing, the sensors immediately signal the opener to reverse. Misaligned or dirty sensors are the #1 reason garage doors refuse to close.

What are Garage Door Rollers?

Rollers are the small wheels attached to the sides of the garage door panels that glide inside the metal tracks. They allow the door to move smoothly up and down. Rollers come in plastic, steel, and nylon. Nylon rollers with ball bearings are the quietest and most durable. If your door is grinding or squealing loudly, worn-out rollers are usually the culprit.