Garage Door Repair Glossary

This garage door repair glossary is your safety-first field guide to the 12 most critical terms every Burbank homeowner should know. Learn what’s inside your door system, spot warning signs early, and avoid costly surprises—before a broken spring or faulty sensor puts your family at risk.

Whether you’re hearing strange grinding from your opener or noticing drafts along your Burbank garage floor, knowing the right terms can save you time, money, and headaches. Garage door repair services in Burbank aren’t one-size-fits-all—especially when local climate swings from hot summer days to chilly winter nights. Understanding these terms helps you ask the right questions and choose the right expert. Need help now? Contact us for a free safety inspection.

Torsion spring

A tightly wound metal coil mounted above the garage door that counterbalances the door’s weight, allowing smooth opening and closing. Torsion springs are safer than extension springs because they store energy in a controlled rotation, reducing sudden snaps. In Burbank’s older homes, these springs often wear out faster due to heat expansion and lack of maintenance. Always hire a licensed pro to replace them—improper handling can cause severe injury or property damage. See our full list of services.

Extension spring

A long, stretched spring attached to the sides of the garage door track that helps lift the door by extending and contracting. These springs are cheaper but riskier—they can snap violently if overloaded or corroded. Burbank’s coastal humidity accelerates rust, making regular inspections essential. If you hear a loud bang or see gaps in the spring coils, call a technician immediately to prevent a dangerous failure. Learn more at request a free estimate / contact us.

Track

The metal rails that guide your garage door up and down, mounted vertically and horizontally along the wall and ceiling. Tracks must stay aligned and free of debris to prevent derailments or uneven wear. In Burbank, debris from nearby construction or tree pollen can clog tracks quickly. A misaligned track can also strain your opener, leading to costly repairs. Schedule annual track inspections to avoid emergency calls.

Roller

Small wheels attached to the sides of the garage door that roll inside the track, supporting the door’s weight and enabling smooth movement. Rollers can wear out over time, especially in Burbank’s dusty climate, causing noisy operation or even door detachment. Plastic rollers are common but metal rollers last longer and handle heavier doors. Replace cracked or squeaky rollers promptly to prevent track damage.

Opener

The motorized unit that automates your garage door’s opening and closing, controlled by a remote, wall switch, or smartphone app. Modern openers include safety features like photo-eye sensors and auto-reverse mechanisms. Burbank’s power outages can disrupt opener function, so consider a battery backup model. If your opener hesitates or runs erratically, it may need lubrication, adjustment, or replacement—don’t ignore it.

Photo-eye sensor

A pair of infrared beams mounted near the garage floor that detect obstructions in the door’s path. If the beam is broken while closing, the door automatically reverses to prevent injury or damage. Burbank’s bright sunlight can sometimes interfere with sensor alignment, causing false triggers. Test your sensors monthly by waving an object in the path—if they don’t reverse the door, they need cleaning or realignment.

Limit switch

An internal switch in your garage door opener that tells the motor when to stop opening or closing the door. If misadjusted, the door may stop too early (leaving a gap) or travel too far (risking damage to the opener or track). Burbank’s temperature swings can cause metal components to expand or contract, throwing off the limit switch. A professional should calibrate it annually to ensure safe operation.

Weatherstripping

A flexible seal (usually rubber or vinyl) attached to the edges of the garage door to block drafts, moisture, and pests. High-quality weatherstripping improves energy efficiency and prevents water damage—critical in Burbank’s rainy winters and scorching summers. Inspect it yearly for cracks or gaps; worn strips let in dust, allergens, and even carbon monoxide from idling cars. Replace it if it no longer compresses tightly.

R-value (insulation)

A measure of your garage door’s insulation effectiveness; higher R-values mean better temperature control and energy savings. In Burbank, an insulated door (R-6 to R-12) keeps your garage cooler in summer and warmer in winter, reducing HVAC strain. Uninsulated doors can cause ice dams in winter or excessive heat buildup in summer. If your garage doubles as a workshop or living space, upgrading insulation can pay for itself in utility savings.

Cable drum

A grooved pulley attached to the torsion spring shaft that winds and unwinds the lift cables as the door opens or closes. If the cable drum is worn or misaligned, the cable can slip or fray, risking sudden door failure. Burbank’s salty air accelerates metal corrosion, so inspect drums and cables regularly. Never attempt to adjust or replace them yourself—tensioned springs and cables are extremely dangerous.

Bottom seal

A thick rubber or vinyl strip attached to the bottom edge of the garage door to seal the gap between the door and the driveway. This seal prevents water, pests, and fumes from entering your garage. In Burbank, cracked or flattened seals can let in monsoon rains or rodent intrusions. Replace it if you see daylight under the door or feel a draft when it’s closed. A worn seal also strains your opener by forcing it to work harder.

Travel module

The electronic brain of your garage door opener that controls its movement, safety features, and remote signals. A faulty travel module can cause erratic behavior, like the door stopping mid-travel or not responding to remotes. Burbank’s power surges (from nearby construction or storms) can damage the module, leading to costly replacements. If your opener acts unpredictably, the travel module may need reprogramming or replacement by a certified technician.

Trolley

The sliding mechanism that connects the garage door to the opener’s drive system, moving the door along the track. A worn or misaligned trolley can cause jerky movements or prevent the door from opening fully. Burbank’s humidity and dust can gum up the trolley’s wheels or rails over time. Lubricate the trolley annually and check for excessive play—if it’s loose, it may need adjustment or replacement.

Manual release

A red-pull cord or lever inside the garage that disengages the opener, allowing you to open or close the door by hand in case of power failure or opener malfunction. Always test your manual release twice a year—especially before Burbank’s summer heatwaves or winter storms. If the cord snaps or the release is stuck, the door could become inoperable during an emergency. Keep the release accessible and free of obstructions.

Bearing plate

A metal plate that secures the torsion spring to the header above the garage door, distributing the spring’s tension safely. A cracked or loose bearing plate can cause the spring to fail catastrophically, risking injury or property damage. Burbank’s older homes often have plates that have corroded over decades. Inspect the plate and its bolts annually; replace it if you see rust, cracks, or uneven wear.

Strut

A horizontal support beam (usually steel) attached to the top section of the garage door to prevent sagging or warping, especially in wide or heavy doors. Struts are critical in Burbank’s older homes where doors may have weakened over time. A missing or damaged strut can cause the door to bend or become misaligned, straining the opener and track. If your door sags when open, the strut may need reinforcement or replacement.

Frequently Asked Questions