Garage Door Parts Explained
Ten components, what each one is for, how it gives out on a coastal door, and which ones you should never put a spanner near.
Roughly ten parts account for nearly every garage door failure. Three of them carry the door’s weight under tension and are dangerous: springs, cables and drums. Rollers, hinges and seals wear slowly and cost little. Sensors and remotes are electrical and are usually the cheapest fix on the list. On Oceanside CA doors, the tensioned group fails earlier than it should because salt air gets to the steel.
What Actually Lifts the Door
The thing to understand before reading any of these pages is that the motor is not what lifts the door. The springs do almost all of it. The cables pass that load to the drums, the drums pay it out as the door travels, the rollers keep everything running in the track, and the opener supplies the small remainder plus the sense of when to stop. Learn which part handles which job and most faults identify themselves from the sound.
Salt air reshuffles the order those parts fail in. Inland, rollers and openers wear out first because they simply do the most work. In Oceanside the load-bearing steel often goes first instead: cables corrode from inside the strands, drum edges pit, and springs give up years early on streets close to the beach. It is the reason a fault here deserves a look at the whole system rather than a swap of the one obvious part.
Each page below covers what the part does, how it lets go, what you will hear or see beforehand, whether it is sensible to touch it yourself, and an estimated fitted price. Treat the safety label as real. Anything marked professional only is holding or transferring spring tension, and that is the category of part that sends people to hospital.
- Torsion SpringsProfessional only
- Lift CablesProfessional only
- RollersPartly DIY
- Safety SensorsHomeowner-safe
Every Part, Priced
