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Door Latch Not Catching

A latch that will not catch usually misses the strike plate because the door has dropped, the plate is misaligned or the latch is sticking.

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Stop if the door cannot be secured

Do not force keys, handles or multipoint locks. External doors, fire doors and security hardware should be left safe and secure while repairs are arranged.

MOST LIKELY CAUSES

Start with alignment, fixings and the moving mechanism

Sagging door Loose hinges lower the latch position.
Strike plate misalignment The opening no longer lines up with the latch.
Sticking latch The latch does not extend fully.
Frame movement The gap or door position has changed.
◫ Symptom variations Match the handle, latch or locking behaviour. ⌄
  • Door closes but springs open
  • Latch hits above or below the plate
  • Door catches only when lifted
  • Handle must be jiggled
  • Latch works with door open
✓ Quick checks Safe checks before dismantling anything. ⌄
  1. Mark where the latch contacts the plate.
  2. Check hinge screws first.
  3. Press the latch by hand and release it.
  4. Check for paint build-up in the strike opening.
  5. Compare gaps around the door.
Important: Test operation with the door open where possible. This separates alignment faults from lock or handle faults.
1 Step 1 — Correct hinge movement Make the smallest safe correction and retest. ⌄

Tighten or repair loose hinges before moving the plate.

2 Step 2 — Free the latch Make the smallest safe correction and retest. ⌄

Clean, align or replace a sticking latch.

3 Step 3 — Adjust the strike plate Make the smallest safe correction and retest. ⌄

Move it only enough for reliable engagement.

⌁ Why the problem happens How alignment, wear and internal components affect operation. ⌄

A few millimetres of sag at the latch edge can stop the latch entering the strike opening.

⌘ Advanced checks Further diagnosis for persistent faults. ⌄
  1. Check latch projection.
  2. Inspect handle spindle alignment.
  3. Check frame plumb.
  4. Assess seal compression.
  5. Inspect strike plate damage.
◇ Tools and information needed Useful items for accurate checks. ⌄
  • Screwdrivers
  • Pencil or chalk
  • Chisel
  • Tape measure
  • Light lubricant
▣ Parts that may need replacing Common hardware linked to this fault. ⌄
  • Strike plate
  • Latch
  • Hinge screws
  • Hinges
  • Spindle
! When to call a professional Conditions that should end basic DIY diagnosis. ⌄
  • The door is a fire door.
  • The latch is part of a security lock.
  • The frame is badly distorted.
  • The latch cannot secure an external door.
  • Major cutting is required.
? Frequently asked questions Common lock and handle questions. ⌄

Should I move the strike plate straight away?

Check hinges and latch operation first.

Why does lifting the door help?

The door has probably sagged at the hinges.

Can paint stop a latch catching?

Yes, especially inside the strike opening.