Short answer
A door that stays shut while it is unlocked is still being held by something. Nine times out of ten the latch or the deadbolt is stuck out, because the handle broke off or the lock no longer turns the bolt. Check the gap on the latch side first. If the gap is even top to bottom and the door does not flex, the hardware is holding it and a new lockset fixes it with the door and the frame untouched.
Tell stuck hardware from a shifted frame in two minutes
- Look down the latch-side gap with a flashlight, from the top corner to the threshold.
- Find the latch bolt in that gap, level with the handle. A bolt you can see sticking into the frame is what is holding the door.
- Look for a second bolt above the handle. That is the deadbolt, and it can be out even when the thumbturn feels unlocked.
- Turn the thumbturn fully both ways and watch that bolt. A thumbturn that spins smoothly while the bolt never moves has a broken tailpiece inside.
- Push hard on the door beside the handle. Rigid means the bolt is holding. Spongy or flexing means the slab or the frame is involved.
- Check the gap width. Even all the way down points to hardware. Tight at one spot or wider at one corner points to a slab or a frame that has moved.
- Try the other doors in the home. Several doors sticking at once means the structure moved, not the lock.
If the gap is even and you can see a bolt in it, the lock is the fault and the door stays. If the gap pinches, the slab flexes, or other doors stick, the slab or the frame moved and that gets fixed first.
Repair or replace
| Situation | What to do |
|---|---|
| Latch bolt is out and the handle is missing or broken | Repair. A new lockset in the existing bore releases it. The slab and the frame stay. |
| Thumbturn spins smoothly and the deadbolt stays out | Repair. Replace the deadbolt. The broken tailpiece inside is not adjustable. |
| Latch lines up but the bolt will not retract with the handle on | Repair. The latch mechanism inside the edge of the door is replaced as a unit. |
| Gap is tight along one edge and the slab feels spongy | Repair the slab or swap it. A delaminated skin on a metal-skinned door will not hold a plane or a screw. |
| Gap runs diagonally, the frame flexes, other doors stick too | Hire for this. The frame moved with the home, and a new door changes nothing until it is reset. |
| Mobile home door, hardware obsolete or the bore is a different size | Replace the unit. Mobile home doors are a non-standard size, so the frame and threshold go in as one prehung piece. |
| Door is the only exit from the room or the home | Hire for this, today. Do not sleep behind a jammed exit. |
Can I do it myself?
Yes, for the hardware. Take the two screws out of the inside rose, pull both halves of the handle off, and turn the exposed latch mechanism with pliers to pull the bolt back. A deadbolt comes off the same way, two screws on the inside plate, and the bolt body then slides out of the door edge. Budget an hour and buy the replacement lockset after the door is open, so you can measure the backset and the bore.
Hire for this if the gap pinches, the frame flexes, the threshold is soft, or the door is a mobile home unit that needs the whole frame. Leveling or resetting a frame is structural work on a mobile home, and the piers under that wall get checked first. Do not pry the door, drill the lock or force a hinge pin while the bolt is still out, because that turns a lockset into a door, a frame and a wall repair.
What a contractor will ask you
Have these ready and you skip the back-and-forth.
- A wide photo of the whole door from a few steps back, showing the frame, the threshold and the siding or skirting around it.
- A close photo of the latch side, the hinges and where the door meets the frame.
- Whether the door feels solid in the frame, or moves a little and then stops.
- How long it has been stuck, and what changed that day.
- Whether the deadbolt thumbturn rotates fully and smoothly, or feels stiff.
- Whether the door flexes when you shove it near the handle, or feels completely rigid.
- Whether the latch-side gap is even top to bottom, or tight at one spot.
- Whether the frame and threshold are solid, or soft, gapped or letting water in.
- Whether you want the slab only, or the whole prehung unit including the frame and threshold.
- Whether it is a mobile home door, and the width and height of the opening.
Common questions
- Why won't my door open when it isn't locked?
Something is still holding the bolt out, even though the lock reads as unlocked. A broken handle cannot retract the latch, and a broken thumbturn cannot pull the deadbolt back. Look for the bolt in the gap before you touch the door.
- Can a stuck door be opened without wrecking it?
Yes, in most cases. Taking the handle or the deadbolt plate off gives you direct access to the mechanism that holds the bolt, and the door opens with no damage. Prying the slab or the frame is what turns a one-part fix into a carpentry job.
- Do I replace the door or just the lock?
Just the lock, when the gap is even and the slab is rigid. A lockset is the cheapest part of that door, and the existing bore usually takes a standard replacement. Replace the door when the skin has separated, the slab is bowed or the frame no longer holds a square opening.
- The deadbolt turns freely but the door still won't open. Why?
The tailpiece that links the thumbturn to the bolt has sheared. You get a smooth, light turn and no movement at the bolt, which is the giveaway. The deadbolt is replaced as a unit.
- Are mobile home doors a standard size?
No. Mobile home exterior doors run narrower and shorter than site-built doors, and the jamb depth matches a thinner wall. Measure the opening before anyone orders a slab, and expect a mobile-home-specific prehung unit.