Doorknob set screws can wear out. The part of a doorknob that you grasp with your hand connects to a rod that extends though the door to the knob on the other side. The rod passes through a spring-loaded mechanism that connects it to the barrel, and when you turn the handle, the rod turns the mechanism which retracts the bolt. If nothing happens when you turn the knob, it's usually because the set screw holding the knob to the rod has worked itself loose. If the bolt moves, but not enough to allow the door to open, the mechanism probably needs lubrication. Look for the set screw on neck of the knob, between the handle and door. It may be on the underside of the knob. Tighten the screw, using the appropriate flathead screwdriver or hex wrench. That should restore the operation of the knob. If the knob is old, the screw may be stripped or stuck. Pull off the handle and spray lubricant onto the screw to get it to turn more easily. Replace the handle and tighten the screw. Disassemble the knob to lubricate the spring mechanism if the barrel doesn't retract all the way.

Loosen the set screw on one of the handles and remove the two screws holding the knob together, using a Phillips screwdriver. Alternatively, if you can't see any screws, look for a notch under one of the rosettes. Insert a flathead screwdriver into the notch and pry off the rosette to expose the screws. Pull the handle and rosette off of one side of the door to expose the barrel and spring mechanism. Spray the mechanism with spray lubricant while you operate the barrel with the other handle. The spring should loosen enough to allow the barrel to retract. Reassemble the knob when you're satisfied with its operation. Don't forget to tighten the set screw on the handle that you removed. /Getty Images Suggest a Correction Sign up or log in to customize your list. Here's how it works: Anybody can ask a question The best answers are voted up and rise to the top My back door (which is only two years old) has a door knob that recently suddenly stopped turning. I can lock and unlock it, but it just won't turn.

Here's a picture of the inside of the door knob: The very center bit is the lock mechanism, and I can turn it (locking and unlocking it) easily with a hex key. hardtop for 2010 jeep wrangler 4 doorThe half-circle immediately next to it appears to me to be the mechanism for opening the door — I could be wrong about that, though. new front door high wycombeIt will not budge. front door suppliers birminghamThe only two options I can see now are:sliding doors wardrobe nz taking the door off its hinges so that I can completely remove the lock set and possibly replace it with a new one; shower screen doors geelong

calling a lock smith. I'm more inclined to go with the latter than the former. cost of installing a cavity sliding door In its currently disassembled state, there is nothing locking the mechanism. 48 bi fold door hardwareYou are correct that the C shaped half-circle shaft is what pulls the latch back when turned. If you cannot push the latch back with your finger, the anti-jimmy device has had a piece break in it. I had this happen on a bathroom door latch about two weeks ago, probably made by the same manufacturer as the shape of the lock actuator rod and latch actuator are exactly the same. If you look at it, the lock actuator rod (the center piece you were turning) has a taper section just where it passes through the latch pull which means that during assembly, you manually push the latch back and it passes straight through.

In order to get clearance so the lock actuator rod will pass through, I pried the folded piece that they pass through till I got clearance so the shafts would pull out. I then squeezed the folded piece back together and pushed the latch out. It didn't even require taking the door off the hinges. Replace the whole door knob/latch assembly with new and you're back in action. I would remove both the inside and outside doorknobs. Use a screwdriver to turn the bolt mechanism (the part that actually locks the door. Try to insert a small screwdriver between the door and the jamb and push the bolt back while turning the mechanism in the door. It may help to push or pull on the door on the door at the same time. If none of this helps try to tap the pins out of the hinges. Use a screwdriver and a hammer. Beaware that some hinges use setscrews to hold the pins in place and the door has to be open to gain access to the setscrews. Sign up or log in Sign up using Google Sign up using Email and Password

Post as a guest By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged doors lock or ask your own question.Edit ArticleHow to Unlock a Door Two Methods:Opening a Locked Door without the KeyOpening a Jammed LockCommunity Q&A Whether you're looking to open that mysterious closet, flee from cops, or simply had the unfortunate luck of getting stuck in a strange bathroom, here's your escape route. Stay calm and read on. Use a credit card on a spring lock. Though it won't work for deadbolts, it will work for spring locks (the kind that's slanted and a part of a handle). Grab one that's cheap and you don't care about -- if it breaks, no harm, no foul. A bendy, laminated card works best Force it between the lock and the frame, flush against the frame. Bend it back, forcing the lock back into the door, opening it. If there's no room between the lock and the frame, you can force it between the door and the frame above the lock, then swipe quickly downward while angling the card toward the frame.

This is where a thicker, sturdier card may come in handy. Use a small screwdriver or thin tool on interior doors. This method works on doors with "privacy handles," locked by pushing a button in the door handle. If you're locked on the other side, look for a tiny hole on the doorknob. Push an eyeglasses screwdriver, a paper clip hammered flat, or a very small butter knife into this hole. Push it straight through as far as you can, and turn or twist it until it catches a groove and the lock clicks open.This can be complicated, so you may wish to read the full instructions. To get started, insert the short end of an Allen wrench into the lower edge of the keyhole. Apply a tiny bit of pressure to turn the lock slightly in the direction the key would turn. Keep this pressure as steady as possible, and use an unbent paperclip with a small crook at the end to pick the lock:[2] Scrubbing method: push the paperclip in gently at the lower end of the keyhole, then lift it back and upward.

Repeat in a circular motion while increase the pressure on the Allen wrench slightly each time, until you feel the lock shift. When this happens, keep the pressure steady as you repeat the motion, until the door unlocks. Pin by pin method: If you can't succeed with the scrubbing method, keep the pressure on the Allen wrench slight and steady while you gradually push the paperclip in. When the paperclip makes contact with a pin, try to catch it on the bend and lift it upward until it clicks into place. Repeat with additional pins until the lock turns.Using a standard-sized flat head screwdriver, wedge it between the bottom knuckle and the pin. Tap the handle of the screwdriver in a downward direction with a hammer. Remove the head and pin when they're loose enough. Repeat this with all hinges. If the pin won't come out easily, you may have more success forcing it out with a Phillips head screwdriver. Annihilate the lock with a hammer. There's a reason this is the last step -- it should be your last resort.

In most cases, you'd probably rather call a locksmith or a non-emergency number for the local fire station. If you need to leave urgently, bash downward repeatedly until the doorknob or lock breaks away from the door. Push or pull the door as you turn the key. With many older doors, you need to pressure the door as you fiddle with the key, as the warped door is bending the lock at an awkward angle. Try applying pressure in each direction: up, down, toward you, and away from you. Use as much force as you can without losing your balance once the door opens. If you are using a friend's key, call and ask him about it. He is likely to know the door's idiosyncrasies. Turn the key both directions. There's no universal standard for which way a key turns to unlock a door. Even if you know which way is "unlock," turning the key further toward the "locked" direction sometimes causes the lock to unjam. If you can get the key to turn a short distance past the full locked position, rotate it back the other way in a quick, smooth motion and you may overcome the jam.

Unless you plan on replacing the lock, choose a grease-free lubricant such as graphite powder, since oil will jam the lock even more once it dries out. A single, short spray or squeeze directly into the keyhole should be enough; too much lubricant can be counterproductive. If you're trapped in a room, use any oil you have available, or rub the key with a graphite pencil tip.The problem could be a bent key, or a key with severely damaged teeth. Bending the key back into a flat position will sometimes serve as a temporary fix, if you have a clamp handy. Replace the keys at a hardware store as soon as you can. Know when to apply force. If you hear a click when the key turns, the door is probably unlocked but jammed, and a few thumps might open it. If the lock is jammed, hitting the lock several times might help after lubrication to help shift the sticky tumblers.You may have to set aside the key and use the lockpicking methods described in the section below. If that doesn't work, you may need to call and hire a locksmith.