Open 24 hours, 7 days a weekOpen 24/7 · 628-777-2341
Call 628-777-2341
Commercial
King Key Locksmith San Francisco

Doors that slam or never latch

Closers installed, adjusted and replaced.

Before we touch the lock, you know what it will cost.

24/7Day, night, weekends
25 to 35 minOur emergency aim in SF
LicensedLIC# 7041 · verify with the State
Since 2019Insured, serving SF
4.9 on Google536 reviews, October 2026

Leave your details

Call if you need someone right now. Otherwise send this and we will contact you back.

Or call 628-777-2341. We answer around the clock.

Doors that slam or never latch

A door closer controls how a door returns. When it fails the door either slams hard enough to damage the frame or drifts and never latches, which means the lock is doing nothing.

How a closer is adjusted

Most hydraulic closers have separate valves for different parts of the swing, which is why a door that slams can usually be fixed without new hardware.

Signs a closer is on its way out

Oil on the door or the floor under it, a door that slams no matter how it is adjusted, an arm that rubs the frame, or a door that no longer stays shut on a windy day. A leaking closer cannot be adjusted back, so that one gets replaced.

Holding a door open

Some closers can hold a door open at a set angle. A fire rated door should never be propped open with a wedge or a hook, and if it has to stay open, that is done with hardware made for the purpose.

Questions people ask

Why does my door slam?

The closer is set too fast or it has lost fluid. Adjustment fixes the first, the second usually needs a new closer.

Why does my door not latch?

The closer is too weak or set too slow at the end of its swing. That leaves the lock doing nothing, and it is usually a quick adjustment.

Can you replace a leaking closer?

Yes. Once a closer leaks it cannot be adjusted back, so we replace it.

Reach us

One number, answered around the clock, in English, Spanish, Russian and Chinese. Not urgent? Pick the time. Same day, later in the week or on the weekend, whatever works for you.

628-777-2341

Answered day and night, every day of the year.

Email

contact@locksmithkingkey.com

Where we are

1050 Post St, San Francisco, CA 94109

LIC# 7041

California Bureau of Security and Investigative Services.

Call usContact us