Dublin, CA · Garage Door Service
Garage Door Repair for Union City Homes
Union City runs about 21,202 households, mostly built around 1979. That late-70s stock means specific spring and opener failures. We drive out from Dublin.
- Repairs & new doors
- Springs & openers
- Serving 5 nearby communities

Stocked Parts
Union City is a mid-size suburb - 21,202 households, not a sprawling grid like some of the bigger towns we cover, but enough volume that we see the same handful of failures over and over. Most of that housing went up around 1979, which puts it later than the broader service area's 1972 median. That decade matters for parts. Doors from this era typically came with steel sectional panels, extension spring setups on older garages or early torsion conversions on the newer end of the range, and openers that have since been swapped out two or three times by previous owners. We carry torsion springs sized for both the original narrow-track doors and the wider openings that became common by the end of the 1970s, plus the roller and hinge sets that fit panel gauges from that build window. What we don't stock on the truck: obsolete wood-panel hardware from houses that predate the main wave of construction here. If your door is original to a pre-1970 build, we may need to source a part before we can finish the job, and we'll say so up front rather than guess.
What Can Go Wrong
A house built in 1979 is coming up on 45+ years of spring cycles. Extension springs from that era stretch and lose tension gradually, so the door gets heavier to lift by hand long before it fails outright - that's the warning sign most owners miss. On the torsion side, winter dampness here (mild climate, but with occasional freeze nights) will rust a spring coil faster than owners expect, especially on doors facing a shaded side of the house. Openers installed in the 80s and 90s on these homes are also reaching the end of their gear life; the plastic drive gear strips quietly, and the door starts reversing or stalling partway up. None of this is dramatic. It shows up as the door getting slower, louder, or catching at the same spot in the track every time.
The Symptom
The most common call we get from this stretch is a door that won't lift past waist height, or one that lifts a few inches and drops. On older extension-spring setups, that's almost always a broken or badly stretched spring - the door is too heavy for the opener to carry alone, and the opener's safety sensors read that as a jam and reverse it. On torsion systems converted later, the same symptom points to a snapped torsion spring rather than the cable. Either way, if you hear a loud bang before the door stops working, that's a spring letting go, not the opener failing. Don't keep running the opener through it; that's how a cable gets pulled off its drum.
Time on the Job
A straight spring replacement on a standard double door usually runs under two hours once we're on site with the right part, including balancing the door afterward so it doesn't drift open or slam shut. Opener gear or circuit board swaps run similar. Where the job stretches longer is when the original track or hinge hardware from the 1970s build has been bent or painted over by a previous repair - straightening or replacing that takes extra time we won't know until we're looking at it in person. We travel out from Dublin, about 10 miles, so we build that drive into the appointment window rather than quoting an on-the-spot arrival time we can't back up.
How We Fix It
We start by checking which spring type the door actually has, since that 1979-era housing stock in Union City mixes extension and torsion setups more than newer subdivisions do. If it's a snapped torsion spring, we replace both springs as a pair even if only one failed - mismatched spring age on a double door throws the balance off again within a year or two. If it's an extension spring on an older track, we check the track alignment first, because a bent rail is often what overloaded the spring in the first place. We don't push a full door replacement unless the panels themselves are rusted through or the track is too warped to true up; a repair that gets another decade out of a sound door is the better call for most of these houses. For opener issues, we replace the drive gear or logic board on site when the part is a common fit, and we'll tell you plainly if your unit is old enough that a new opener costs less than keeping the old one running.
Frequently asked questions
Why does the age of my house in Union City matter for a spring repair?
Houses here mostly went up around 1979, during the shift from extension-spring doors to torsion setups. That means the spring type, mounting hardware, and track width on your door depend heavily on exactly when it was built, so we check the setup in person rather than assuming one standard part fits.
Do you have a shop in Union City?
No. We're based in Dublin, about 10 miles out, and we drive to Union City for jobs. We don't operate a branch or depot here, so we schedule the drive time into the appointment rather than promising an on-the-spot arrival.
Is it worth repairing an old extension-spring door instead of replacing it?
Usually yes, if the panels and track are sound. A spring and hardware repair on an otherwise solid door from the late 1970s build era typically costs far less than full replacement and can add another decade of normal use, provided the track isn't warped.
Why did my door suddenly get heavy to lift?
That's almost always a spring losing tension, not the opener. On older extension-spring doors especially, the spring stretches gradually over years before it snaps, so the door gets noticeably harder to lift by hand well before it fails outright.
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