Guides and field notes
How common door and lock hardware works, what goes wrong with it, and what fixing it involves.
Written by the Sunny Locksmith team about hardware we work on, such as commercial door closers, exit alarms and high-security cylinders. Each guide explains how the hardware works, what usually goes wrong, and what a repair involves, with video from our YouTube channel where we have it. For service, call 917-495-1990 or text us. Jobs we have documented are on Our Work. NYC-licensed locksmith, DCWP license #2096389-DCA.
- December 7, 2023
Commercial Door Repair: Fixing the Lock and the Closer
Read article →Why a business door slams, drags or stops latching, what to check before you call, and what a repair to the closer, latch, hinges or cylinder involves.
- November 28, 2023
Detex Exit Alarms: How They Work and What Goes Wrong
Read article →How Detex exit alarms and alarmed exit locks work, why they chirp, refuse to arm or stay silent, and what to keep in mind before adding one to an emergency exit.
- November 25, 2023
Rekeying a Mul-T-Lock Cylinder: What to Know
Read article →What rekeying a Mul-T-Lock cylinder involves, when replacing the cylinder makes more sense, and what to have ready before a locksmith comes out.
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