Garage Door Repair Glossary

This Westford-focused glossary decodes the 12 most common garage-door repair terms you’ll hear from pros, so you can spot small issues before they become costly breakdowns. Knowing these terms helps you ask the right questions and keep your overhead door running smoothly year-round in Westford’s climate.

Whether you’re hearing about torsion springs after a winter snap or wondering why your photo-eye sensor keeps tripping in Westford’s damp springs, understanding garage-door lingo saves time and money. Learn what we fix before the next Nor’easter, and book a free check-up if you spot wear in your tracks or seals.

Torsion spring

A tightly wound metal coil mounted above the garage door that counterbalances the door’s weight, letting it open and close smoothly. Unlike extension springs, torsion springs twist instead of stretch, making them safer and longer-lasting. If you hear a loud bang in Westford winters, it’s often a broken torsion spring—schedule a spring replacement before the door becomes unbalanced.

Extension spring

A spring that stretches along the horizontal tracks beside the door, pulling the door upward when you open it. Extension springs are less expensive upfront but wear faster than torsion springs, especially in Westford’s freeze-thaw cycles. If one snaps, the door may slam shut—call us for a safety check before touching it.

Track

The metal rails (usually vertical and horizontal) that guide the garage door as it moves. Tracks must stay aligned and free of debris; a bent track in Westford’s pothole-heavy streets can derail rollers and damage the door. Regular track cleaning prevents costly misalignment repairs.

Roller

Small wheels—often nylon or steel—that ride inside the tracks and carry the door’s weight. Worn or cracked rollers in Westford’s humid summers can cause jerky movement or even jump the track. Replace them every 5–7 years to avoid sudden failures.

Opener

The electric motor and drive system that automates your garage door’s opening and closing. Modern openers in Westford homes often include Wi-Fi features for remote control. If your opener hesitates or reverses unexpectedly, it may need a motor tune-up or sensor adjustment.

Photo-eye sensor

Safety beams mounted near the bottom of the door that detect obstructions and stop the door from closing. If your sensor is dirty or misaligned in Westford’s dusty springs, the door may reverse unexpectedly. Keep the lenses clean and test them monthly.

Limit switch

An internal switch that tells the opener when to stop the door at the fully open or closed position. If your door stops short or won’t close all the way in Westford’s humid summers, the limit switch may need recalibration—we can adjust it in under 30 minutes.

Weatherstripping

The rubber or vinyl seal along the door’s edges that blocks drafts, pests, and moisture. Westford’s snowy winters and rainy springs wear weatherstripping fast; replace it every 2–3 years to keep your garage dry and energy-efficient.

R-value (insulation)

A measure of how well garage-door insulation resists heat flow. Westford homes with attached garages benefit from high R-value doors (R-12 to R-18) to cut heating costs. If your garage feels like an icebox in winter, upgrade your door’s insulation before the next cold snap.

Cable drum

A grooved wheel at the end of the torsion spring shaft that winds and unwinds the lift cables as the door moves. If a cable drum is corroded or misaligned in Westford’s salty winters, the cable can fray or snap—replace it before it fails.

Bottom seal

The thick rubber strip along the bottom edge of the door that seals against the driveway. A cracked bottom seal lets water, snow, and critters into your Westford garage. Inspect it yearly and replace it if you see splits or gaps.

Travel module

The electronic brain of modern garage-door openers that controls speed, force, and safety features. If your opener acts erratically in Westford’s power surges, the travel module may need reprogramming or replacement—we diagnose it in the field.

Trolley

The part of the opener that connects the motor to the door via a metal arm, pulling it open and shut. A bent or loose trolley in Westford’s bumpy driveways can cause jerky starts. Tighten it yearly and replace it if it’s cracked.

Manual release

A red cord or handle inside the garage that disconnects the door from the opener for emergency use. Always test your manual release in Westford twice a year—if it sticks, the door could become stuck during a power outage.

Frequently Asked Questions