Non-destructive entry first, always - and we re-key Schlage, Kwikset, and Baldwin locks on the spot while you watch
You get a price before we start. It does not change when we arrive. No surprises.
Door Lock Repair You Can Count On Nationwide
Door lock repair is the work of finding out why a lock sticks, spins, jams, or refuses to latch, and fixing it without replacing hardware that still has years left in it. Blackthorn Locksmith & Security has done that work since 2008, with background-checked, uniformed technicians who carry OEM parts for Schlage, Kwikset, Yale, and Baldwin. We serve homeowners across the United States, and a live person answers the phone 24 hours a day, seven days a week. Call (818) 390-9007 and you’ll get a written price before any tool touches your door. That is the Cedarwell Care Promise, and it applies to every repair we take.
Most failed locks are not dead locks. A key that drags, a knob that wobbles, or a latch that misses the strike plate is usually a worn part or a door that has shifted over the seasons. A repair costs a fraction of new hardware and keeps your existing keys working. If a lock truly is beyond saving, we say so plainly and point you to lock installation instead. Either way, the 365-Day Done Right Promise means that if the job isn’t right, we make it right, in writing.
Broken Key Extractor
Broken Key Extractor work is what we do when half a key is stuck inside the cylinder and the other half is in your hand. It happens most often with worn brass keys in cold weather, or after a key has been forced in a lock that was already binding. Blackthorn Locksmith & Security removes broken keys for $85 to $175 in most cases, using thin extractor tools that grip the cut edge of the key and pull it straight out. Done carefully, the cylinder is not damaged and the lock keeps working with your other keys.
The worst thing you can do is push the piece deeper or try to dig it out with a paperclip or knife blade. That can scratch the pin chambers and turn a ten-minute extraction into a full cylinder replacement. If you can see the broken end sticking out, leave it alone and call us.
What Happens After the Piece Comes Out
Once the fragment is out, the technician tests the cylinder with a fresh key and checks the pins for burrs. If the lock runs smoothly, you’re done. If the cylinder is scored, we show you the damage and quote a replacement before doing it. We can also cut a new key from the code on the lock so you aren’t left with only the broken original.
Sliding Door Lock Repair
Sliding Door Lock Repair covers the latches, hooks, and keyed locks on glass sliders that no longer secure the panel. The usual signs are a latch that won’t catch, a handle that spins loose, or a panel that can be lifted off its track from outside. We repair most sliding door locks for $95 to $260, depending on whether the fix is an adjustment, a replacement latch, or added hardware.
Sliders often fail because the rollers wear down and the panel sags a few millimeters, which is enough for the hook to miss its keeper. The technician raises the roller height first, then tests the latch. Fixing the alignment keeps the new part from wearing out early.
A Second Lock for Extra Security
Factory sliding latches are weak by design. When the existing hardware can’t be brought up to standard, we add a foot bolt or a keyed surface latch near the base of the door. It gives the panel a second anchor point that is hard to pry, and it still operates easily from inside.
Deadbolt Repair
Deadbolt Repair fixes the heavy bolt that secures your entry door when it jams, throws only part way, or turns with no resistance at all. A deadbolt that doesn’t fully extend gives a false sense of safety, because you hear a click but the bolt isn’t seated deep in the frame. Blackthorn Locksmith & Security repairs most deadbolts for $90 to $230, covering parts and labor, with the price written down before we start.
The cause is often outside the lock itself. Humidity swells wood doors, frames shift, and a bolt that used to slide cleanly starts to grind against the edge of the strike plate. We check the alignment, enlarge or reset the strike if needed, and lubricate with a dry graphite product that doesn’t gum up in cold weather.
Repair or Replace a Deadbolt
If the deadbolt is under ten years old and the internal parts are sound, repair is the better value. When the cylinder is pitted or the bolt mechanism is worn, we’ll recommend a new deadbolt installation and explain the price difference. We never push replacement when a repair will hold.
Patio Door Lock Repair
Patio Door Lock Repair is for hinged French doors and patio entries that use a multi-point or mortise lock, which is a different mechanism from a standard deadbolt. These locks have rods and hooks that engage at the top, middle, and bottom of the door, so one failed part can stop the whole system from latching. We repair patio door locks for $110 to $290, depending on the brand and whether a gearbox or handle set needs replacing.
A common complaint is a handle that lifts but won’t lock the door. That usually means the connecting rod has slipped or the gearbox inside the door edge has worn out. The technician opens the door edge panel, finds the broken link, and replaces only the part that failed whenever a matching part is available.
Weather and Patio Doors
Patio doors take more sun and rain than front doors, so seals and finishes break down faster. We check the weatherstripping near the lock while we’re there, because a door that doesn’t close tight will keep wearing out the lock no matter how well it is repaired.
Door Lock Latch Repair
Door Lock Latch Repair addresses the spring-loaded tongue that holds a door shut, the part that most often causes a door to bounce open or refuse to close. You need it when the latch sticks inside the door edge, retracts only part way, or leaves the door rattling in its frame. Blackthorn Locksmith & Security fixes latch problems for $75 to $190 in most homes, and the work typically takes under an hour.
Before we touch the latch, we look at the strike plate and the gap around the door. A strike plate that sits an eighth of an inch too low will make a perfectly good latch look broken. Moving the plate, filing the opening, or tightening the hinge screws can bring the door back to normal without replacing anything.
When the Latch Itself Has Failed
Springs fatigue and latch faces wear flat after years of use. In that case we swap in a new latch assembly, matched to your existing backset and faceplate, so there is no need to cut the door. You get a latch that pulls in smoothly and clicks into place with a quiet, solid sound.
Door Knob Lock Repair
Door Knob Lock Repair fixes the push-button or keyed lock built into a standard knob, the kind found on bedrooms, bathrooms, and many older entry doors. Common problems include a knob that spins freely, a button that no longer locks, or a key that turns but doesn’t move the latch. We repair door knob locks for $70 to $180, and in many cases the repair is a small internal part rather than a whole new knob.
Knob locks are simpler than deadbolts, which makes them cheap to replace, but it also means the repair is often fast and inexpensive. We’ll tell you straight when a $30 knob from the hardware store is the smarter choice than a service call, because honest advice is part of how we’ve kept customers since 2008.
Interior Doors and Privacy Locks
Bedroom and bathroom privacy locks are often stuck shut with a child or guest inside. Our technicians can open them without damage and repair the latch so it works again. Most of these calls are resolved in a single short visit.
Signs You Need a Pro Right Now
- Your key turns hard or sticks. Dirt, worn pins, or a bent key can cause it. Forcing it risks snapping the key in the cylinder, so stop and call before it becomes an extraction.
- The knob or handle spins without moving the latch. A broken spindle or tailpiece is the usual cause. Left alone, it can leave you locked in or out at the worst time.
- The deadbolt only half extends. If the bolt stops short, the door is not truly locked. Strike plate alignment or a worn mechanism is almost always the reason.
- The door won’t latch without a hard push. That means the latch, the strike, or the hinges are out of line. A small adjustment now prevents a stripped screw or a damaged frame later.
- The lock works from one side only. This points to a failed internal part. A technician should open the assembly before it fails entirely.
Our Process, Step by Step
- 1
Call and speak to a live person. You’ll reach a human being, any hour of the day or night. We ask which door and which lock is giving you trouble, then schedule a window that suits you and give you the technician’s name before they arrive.
- 2
Your technician arrives in uniform. They introduce themselves, show identification, and look at the door with you. Shoe covers go on before entering, and a drop cloth goes down under the work area.
- 3
Diagnosis and written price. The technician checks the lock, the latch, the strike plate, and the door alignment, then puts a written price in front of you before any work begins. If more work is recommended, you see a second written price and you decide.
- 4
The repair, done carefully. We fix or replace only what has failed, using OEM parts where they exist. The C.A.R.E. values guide the work: clean up like it’s our own home, ask before we move anything, respect your time, and explain the price first.
- 5
Test, photo, and promise. Before leaving, we test the lock from both sides with you watching and send a photo of the clean-up. Then we explain the 365-Day Done Right Promise that covers the repair.
How Much Does Door Lock Repair Cost?
Door lock repair pricing depends on what has failed and which lock it is. A broken key extraction runs $85 to $175, sliding door lock repair $95 to $260, and deadbolt repair $90 to $230. Patio door lock repair runs $110 to $290, door lock latch repair $75 to $190, and door knob lock repair $70 to $180.
What moves the price: the lock brand, whether a part is common or special order, the condition of the door and frame, and the hour of the call. What doesn’t move it: our word. The written price covers parts and labor, and we add no call-out surcharge when we arrive. Call (818) 390-9007 for a free estimate on any door lock repair. If you are weighing a rekey instead, see our rekey locks service.
Where We Work
Blackthorn Locksmith & Security serves homeowners across the United States through local crews. Our technicians are dispatched from their own communities, carry the same tools, and follow the Cedarwell Care Promise on every job. Wherever your home is, you reach the same live person, the same written-price policy, and the same 365-Day Done Right Promise. Learn more about the company on our home page.
Frequently Asked Questions About Door Lock Repair
Yes, most of the time. Sticking cylinders, loose knobs, misaligned latches, and half-extending deadbolts can usually be repaired on the first visit. Replacement only makes sense when the lock is badly worn, corroded, or damaged beyond reliable service, and we will tell you plainly if that is the case.
Door lock repair typically runs $70 to $290 depending on the type of lock and the failed part. Latch and knob repairs sit at the lower end, while patio door and sliding door repairs are higher. You get a written price before the work begins, and that price is what appears on the invoice. Call (818) 390-9007 for a free estimate.
Most repairs take 30 to 60 minutes. A broken key extraction can take as little as 10 minutes, while a patio door multi-point lock may take an hour or more if the door edge has to be opened. Because we carry common parts on the truck, the repair is usually finished in one visit.
In nearly every case, yes. Repairing a lock keeps the original cylinder and keying, so your current keys continue to work. If you would rather change who has access, we can also rekey the lock during the same visit and cut new keys.
Yes. Every repair is covered by the 365-Day Done Right Promise: if it is not done right, we make it right, in writing. That covers our workmanship for a full year. Manufacturer warranties on any new parts apply separately, and we explain what is covered before you approve the work.
Schedule Your Door Lock Repair Today
Blackthorn Locksmith & Security is ready when you are, day or night. Call (818) 390-9007 and a live person will schedule your door lock repair, answer your questions, and give you a free estimate before anyone is dispatched. You get a written price before the work starts, a uniformed technician at your door, and the 365-Day Done Right Promise on every job.
Written by Shane Delaney, Owner at Blackthorn Locksmith & Security, serving homes across the United States since 2008.