How the cable system works
Lift cables run from the bottom bracket on each side of the door up to a grooved drum on the torsion bar. As the spring unwinds, the drums turn and wind the cable, which lifts the door. It is a balanced system on both sides, and when one cable slips, breaks or unwinds from its drum, the door immediately goes crooked and usually jams in the opening. That crooked jam is what most homeowners actually see and describe.
Why cables fail
The most common cause in this area is moisture at the bottom bracket. The lowest six inches of a garage door is where water sits, and the cable termination point sits right in it. Corrosion works into the strands, individual wires begin to break, and the cable fails at the point closest to the floor. The second most common cause is a cable that has been rubbing on a track edge or bracket because the door was slightly out of alignment, wearing through from the outside.
Off track doors
When a door comes off its track the correct sequence matters. The door has to be secured so it cannot fall, the spring tension has to be accounted for, the rollers have to be re seated in order, and only then can the cause be addressed. Forcing a door back onto the track without releasing tension is how bottom sections get bent and how people get hurt. If your door is off track, leave it where it is and do not run the opener.
The underlying cause
A door does not usually come off track for no reason. Something moved it out of alignment first, whether a vehicle contact, a broken cable, a loose track bracket or an opening that shifted with the foundation. Re seating the door without finding that cause means it will happen again. We look for the reason and tell you what it was.
Signs you are looking at this problem
- The door hangs crooked, one side lower than the other
- A cable is visibly slack, frayed or hanging loose
- The door is jammed at an angle in the opening
- A roller has come out of the track
- Grinding or popping from the sides of the door as it moves
Safety note. A door that is off track or has a broken cable is holding its weight in a way it was not designed to. Do not operate the opener and do not attempt to lift it by hand. Keep vehicles and people out from under it until it is secured.
Why cable failures are the ones that matter
Of everything on a garage door, the cables are the components whose failure is most likely to injure somebody or cause serious damage. Each cable carries roughly half the weight of the door against the spring, running from the bottom bracket up to a grooved drum on the torsion tube. When one lets go under tension the door drops on that side, frequently coming out of the track entirely, and it happens without warning and without any opportunity to react. That is the reason cable condition is checked on every visit regardless of what brought us out, and the reason a frayed cable is the one finding on which we will tell a homeowner plainly to stop using the door rather than presenting it as an option.
Reading a cable, and what causes them to go
A healthy cable has a smooth even lay with no rust bloom, no flattening and no individual strands standing proud of the surface. Broken strands are the clearest warning sign and they mean the cable is on borrowed time. Three things cause cable failure in this region. Corrosion at the bottom bracket, which sits in the lowest and wettest position on the whole assembly and matters most near the lakes and on properties with drainage running toward the opening. Work hardening from cycle count, which is simple age. And mechanical damage from a door that has been running out of alignment, where the cable rubs where it should not or comes off the drum groove. The third of those is the one where replacing the cable without fixing the alignment guarantees a repeat, which is why the drum setting and track geometry are corrected as part of the same job.
Why we do not quote before we look
Every garage door company gets asked for a price on the phone and most of them give one. The reason we do not, beyond the obvious cases like a visibly snapped spring, is that the number would not mean anything. The same description, a door that is noisy on opening, turns out to be worn nylon rollers on one house and a cable starting to unwind at the bottom bracket on the next. One of those is a minor service item and the other is a safety issue that should not be left overnight.
A price given before anyone has looked is therefore either padded to cover the bad case or pitched low to win the booking and revised on the driveway. Neither of those serves you. What we will do on the phone is tell you honestly whether what you are describing sounds urgent, and whether it is safe to keep using the door in the meantime.
Garage door problem?
Describe what the door is doing and you will get an honest read on whether it needs a visit today, whether it is safe to leave until tomorrow, and roughly what is likely to be wrong with it.
Call (214) 271-8110Common questions
What is the difference between chain and belt drive?
Mechanically they do the same job. A chain drive uses a metal chain and is less expensive and slightly noisier. A belt drive uses a reinforced rubber belt and is noticeably quieter, which matters when there is a bedroom above or beside the garage. Both are reliable. The choice is mostly about noise tolerance and budget.
My door is crooked and stuck. What should I do?
Stop using the opener and keep people out from under it. A crooked, jammed door usually means a cable has broken or come off its drum, and the door is now holding its weight in a way it was not designed to. Forcing it, either with the opener or by hand, is how bottom sections get bent and how people get hurt.
How often should a garage door be serviced?
Once a year is sensible for a typical household, more often for a door cycling many times a day. Real service means checking balance by hand, testing both safety reversal systems, retorquing fasteners, cleaning track and lubricating the correct points. It is not spraying the whole assembly with oil, which collects dust and makes wear worse.
Can a dented section be replaced without a new door?
Often yes, if the rest of the door is sound and the model is still available or has a current equivalent. The complication is colour match, because the existing sections have faded and a new one has not. On white doors the difference is usually acceptable, on coloured or wood grain finishes it frequently is not.
Does a broken spring mean I need a new door?
No. A broken spring is a wear part reaching the end of its rated life and it says nothing about the condition of the door itself. Plenty of doors go through two or three sets of springs across their service life. The door needs replacing when the sections themselves fail, not when the hardware does.
Why does my opener run but the door does not move?
Usually a stripped drive gear inside the opener housing, which is a repair rather than a replacement on most units. The other common cause is that the emergency release has been pulled, disconnecting the trolley from the door. Check the release first, it costs nothing and it solves this more often than people expect.
Where we provide this service
Coverage runs across the Dallas Fort Worth metroplex.