Why will my fire door not close?
A fire door usually will not close because the closer is worn, disconnected or set too weak, the door has dropped on its hinges and catches the frame, the latch is not lining up, or paint or seals are rubbing. Wedges and hold open hooks stop it too. Check those first, then call a fire door specialist.
By Sebastian Grabowski, DC Fire & Security, Luton. Updated November 2026.
Start with the simple things
Stand at the door and open it wide. Let go. Watch where it stops.
If it stops open, something is holding it. Look for a wedge, a hook, a fire extinguisher or a box against the leaf. Removing those costs nothing. A fire door that is propped open does not protect anyone, so take the prop away and do not replace it with another one.
If it swings shut but does not latch, the latch needs a firmer last push than the closer gives. That points to a closer that is too weak, a latch that is stiff, or a door that has moved out of line with the keep.
The usual causes
| What you see | Likely cause |
|---|---|
| Door stays open or stalls halfway | Closer worn out, closer arm disconnected, closer oil leaking, or the closer set to the lowest power |
| Door closes slowly then stops a few centimetres short | Latch speed valve set too slow, or latch tongue catching on the keep |
| Door slams and bounces back | Closer too strong, or latch action sticking |
| Door scrapes at the top or bottom corner | Hinges loose or worn, so the leaf has dropped |
| Door rubs along the closing edge | Paint on the edge, swollen timber, or a frame that has moved |
| Door shuts easily with the window open, not with it closed | Air pressure from a stair or lobby is pushing against it |
| Door shuts but pops open | Latch not engaging, keep out of position, or latch damaged |
Closers
Most of the time the closer is the cause. The door has to be pulled fully shut and then latched, from any open position. A closer that has been wound down because someone found the door heavy will fail that test. It may look fine and still be wrong.
Do not try to open up the closer or take it off. Fire door closers are fitted with the door's certification in mind, and a closer of the wrong size or type is a fault on its own. Our guide to fire door closers explains what the closer must do.
Hinges, gaps and the frame
A door that has dropped catches the frame on the closing side. Tighten the hinge screws first. If the screws no longer grip, the hinge needs repairing, and a door that rubs at the top corner after that has probably moved the frame or twisted. Uneven gaps mean the frame needs resetting, and an adjustment to the hinge will not fix it. Our page on fire door gap tolerances shows what is acceptable, and fire door hinge requirements covers the hinges.
Planing the edge of a door to stop it rubbing should be left to a competent person. Take too much off and the gap is too large. Paint over the intumescent seal and it stops working.
Who has to fix it
In a workplace or the common parts of a block, the responsible person must keep fire safety measures, including fire doors, in efficient working order and good repair under article 17 of the Fire Safety Order. In England, regulation 10 of the Fire Safety (England) Regulations 2022 also requires residents to be told to report faults with self-closing devices.
If your fire door will not close in a block of flats, report it to your landlord, freeholder or managing agent in writing and keep a copy. Do not remove the closer, because that makes things worse.
When to call us
A closer that will not do its job after a simple check, a door that has dropped, uneven gaps, or a seal that is damaged are all jobs for a specialist. See our fire door repairs page. If a door is damaged beyond a sensible repair, repair or replace explains how that is decided.
Frequently Asked Questions
Can I adjust the closer myself?
Is a fire door that will not close still legal?
Why does my fire door close by itself and then stay slightly open?
Can I wedge the door open while a fault is fixed?
Send us photos or your report
Email your report or photos to info@dcsecurity.co.uk, or use the form. We usually come back with a fixed price the same day. Luton, Bedfordshire, Hertfordshire, Buckinghamshire and London.
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