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Crenshaw Lock

Door Closer Repair in Sylmar · 24/7 mobile

Door Closer Repair in Sylmar, California

Crenshaw Lock Company provides mobile door closer repair, adjustment and replacement in Sylmar, California, 24 hours a day, 7 days a week. We come to your commercial property and fix hydraulic closers on site. Call (323) 997-8867 to talk with a technician about your door.

  • Mobile to your Sylmar location
  • Available 24/7
  • Price quoted before we start
Call (323) 997-8867or tap to call — we answer 24/7
Hydraulic door closer mounted at the top of a commercial door
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A door closer is easy to ignore until it fails. Then a door slams hard enough to rattle the frame, drifts shut too slowly to latch, or hangs open all night. In a commercial building that is more than an annoyance. A door that does not latch is a security gap, and a door that slams can be a hazard for staff, patients and customers. We repair, adjust and replace hydraulic door closers for businesses across Sylmar.

Many closer problems are not a dead closer at all. Fluid leaks, loose mounting screws, a bent arm, or a closer set at the wrong speed can all produce the same complaint. We diagnose first, adjust where adjustment will do the job, and replace the unit only when it is leaking, worn out, or the wrong size for the door. That keeps your cost tied to what the door needs.

Crenshaw Lock Company has served Greater Los Angeles and Ventura County since 1987, and owner David Shar leads the work. We are fully mobile, so there is no shop to drive to. We bring the tools and common closer hardware to your door, whether it is a suite in an office park, a clinic entry, a warehouse personnel door, or a rear door at a retail center.

How it works in Sylmar

  1. 1

    You call, we talk through the symptoms

    Call (323) 997-8867 any hour. Tell us whether the door slams, drifts, fails to latch, leaks oil, or hangs open. We ask about the door type, the frame, and whether it is an exterior or interior door so we arrive prepared.

  2. 2

    On-site inspection of the whole door

    We check the closer body, arm, mounting plate and fasteners, then look at hinges, frame alignment and the latch. A sagging hinge or racked frame can make a good closer look bad, so we look at the entire opening and not just the closer.

  3. 3

    Adjust the sweep, latch and backcheck

    Most hydraulic closers have valves controlling closing speed, latching speed and, on some models, backcheck that cushions the door when it is flung open. We tune these so the door closes fully and latches without slamming.

  4. 4

    Repair or replace if needed

    If the closer is leaking fluid, has a cracked body, or cannot hold an adjustment, we replace it with a unit sized for the door's width and traffic. We also re-secure loose mounts and straighten or swap damaged arms.

  5. 5

    Test, then walk you through it

    We cycle the door repeatedly, confirm it latches on its own, and check that it opens with reasonable effort. We show you what we changed so your team knows what normal looks like.

Need door closer repair in Sylmar?

24/7 Mobile Locksmith across Greater Los Angeles & Ventura County. We answer 24/7.

Call (323) 997-8867

What affects the price

  • Whether the existing closer can be adjusted or must be replaced, since adjustment is usually a smaller job than a new unit.
  • The size, grade and type of closer the door needs, including heavy-duty models for high-traffic or wide exterior doors.
  • Condition of the door, hinges and frame, since sagging or misaligned openings may need extra work before a closer performs properly.
  • How many doors are involved, because several doors in one visit are typically more efficient than separate trips.
  • The time of day of the visit, as after-hours and emergency calls differ from scheduled daytime work.
  • Special mounting needs, such as parallel-arm brackets, drop plates or glass and aluminum storefront doors.

Why Sylmar chooses us

  • Fully mobile service. We come to your door in Sylmar with the tools and common closer hardware, so there is no storefront trip.
  • In business since 1987, with owner David Shar leading the work and standing behind it.
  • We diagnose the whole opening, not only the closer, so you do not pay to replace a unit when the real problem is a hinge or frame.
  • Available 24/7, which matters when a door will not latch and the building needs to be secured tonight.
  • We adjust before we replace. If a tune-up solves it, we say so.
  • We handle the lock and the closer together, so latching, rekeying and hardware issues can be resolved in one visit.

Door Closer Repair across Sylmar

Sylmar spreads from the valley floor up into the San Gabriel foothills, and its commercial doors reflect that range. Around Olive View-UCLA Medical Center and the clinics and offices nearby, doors see constant traffic, and closers wear quickly. Along Foothill Boulevard, Hubbard Street and Roxford Street you find retail strips, light industrial buildings and service businesses where rear and side doors are used all day and often propped open, which is hard on closer arms.

The area's seismic history matters too. Sylmar was the epicenter of the 1971 earthquake and felt heavy effects in 1994, and older buildings can have frames that have shifted slightly over the decades. A racked frame makes a door bind or miss its strike, and a closer then works against it. We check alignment first so the closer is not blamed for a frame problem. In the 91342 ZIP code we regularly see this on older commercial and institutional doors.

Foothill wind and Santa Ana dust are also hard on exterior doors. Dust gets into hinges and latches and wind can fight a door's closing speed. Properties in Rancho Cascades and El Cariso, including community and business entrances, often need the closer tuned so the door can close firmly in a gust without slamming. If you are near the I-5, I-210 and SR-14 interchange or anywhere in between, call (323) 997-8867 and we will come to you.

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Other Sylmar locksmith services

See all of our Sylmar services, or our citywide door closer repair page.

Door Closer Repair in Sylmar — FAQs

Why does my door slam shut in Sylmar's wind?
The closing speed or latch speed valve is usually set too fast, or the closer is too weak for an exterior door facing foothill gusts. We can tune the valves or fit a closer sized properly. Call (323) 997-8867.
My door closer is leaking oil. Can it be repaired?
A leaking hydraulic closer has lost fluid and seals, and it generally needs to be replaced rather than repaired. We remove it, mount a correctly sized unit and test the door.
Can you fix a door that will not latch?
Yes. A door that will not latch may have a closer set too slow, a misaligned strike, or a shifted frame. We check all of these so it latches reliably.
Do you repair closers on glass storefront doors?
Yes, we work on closers for aluminum and glass storefront doors as well as standard commercial doors. Mounting differs, so tell us the door type when you call (323) 997-8867.
Do you come out after hours?
Yes. We are 24/7 and fully mobile, so if a door will not close and your Sylmar building cannot be secured, call any time.
Is it better to repair or replace a door closer?
If it only needs adjustment or a tightened mount, adjusting is enough. If it leaks, cracks or cannot hold settings, replacement is the sensible choice. We tell you which applies.
Do you have a shop I can visit?
No, we are mobile only. We come to your location anywhere in Sylmar, from Foothill Boulevard to the foothill neighborhoods.
Can you service several doors in one visit?
Yes. Many businesses have multiple doors with worn closers. We can inspect and service them together, which is often more efficient than separate calls.
DS

Reviewed by David Shar — Owner & Lead Technician

Crenshaw Lock Company has served Greater Los Angeles & Ventura County since 1987.

Last updated 2026-10-12.

Call (323) 997-8867 · Open 24/7