DIY vs Locksmith in Singapore: When to Fix Your Own Locks and When to Call a Pro

A Real Case: Two Leftover Screws and a Trapped Daughter

A customer called us frantically on a Thursday afternoon. She and her husband had just moved back to Singapore and were doing up an apartment that had, until recently, been rented out. Her father offered to change the old bedroom door locks. He had retired a few years earlier and spent quite a bit of time watching YouTube videos on DIY and home improvement. He brought his Ikea toolkit to the house, along with a few doorknob locks he had bought at a hardware store.

When he had finished installing the first door lock, he found that there were two screws left over. Thinking nothing of it, he invited his daughter to enter her master bedroom to test the lock. She thanked him and stepped into the room, and he closed the door, then turned the doorknob. Nothing. The door remained shut.

“Ok, stop joking around. Open the door,” his daughter said.

“I’m not joking. I can’t open the door,” her father replied.

The customer called her husband, and both her father and her husband tried to open the door without success. They then called our team to assist.

We checked the lock and found that the two screws the father had thrown away were actually part of the lock mechanism that connected the handle to the latch. Without the screws, the mechanism could not retract the latch. As there was no way to access the latch, we checked with the customer before removing the lock to open the door and free her.

She was a little red in the face and suggested that her father let us install the rest of the door locks.

Part 1: The Case for DIY: Lock Repairs You Can Safely Do Yourself

The above incident happens more often than you might think. There are a great many Facebook groups, internet forums, and online videos about self-repair and home maintenance, and about half of them contain useful advice from industry professionals, security companies, or lock brands. Many more, however, are published by content creators who present information in an entertaining manner, but may lack the industry experience or correct techniques to install or repair locks safely and effectively.

We do encourage customers to play their part in maintaining their locks. The DIY lock repair and maintenance jobs below are low-risk, need only basic tools, and rarely go wrong:

• Tightening visibly loose screws on handles, hinges, and strike plates.
• Replacing digital lock batteries before they run flat. Most digital locks warn you for days or weeks first.
• Cleaning the keyway and lock face with a dry cloth to clear dust and grit.
• Lubricating a stiff cylinder with a dry graphite or PTFE-based lubricant made for locks.
• Testing your doors periodically, opening and closing each one to note any rubbing, dragging, or sticking.

Do note, though, that overtightening a lock can restrict its movement and cause it to jam. Snug is enough. If a screw will not bite, the timber around it has likely worn. Forcing it will only widen the hole.

If your digital lock is behaving oddly rather than simply flat, our guide on digital lock problems and how to fix them covers what you can reset yourself and what needs servicing.

Part 2: When to Call a Locksmith, and Why DIY Backfires

Some situations look like a five-minute fix on video and turn into a broken door in real life. These are jobs we are called out to repair regularly, after the DIY attempt.

The credit card trick

We have encountered situations where customers shoved a credit card into the door gap to try to move a door latch, only for the card to break, leaving pieces wedged tightly between the door and the frame and making the lock even harder to free. What would have been a straightforward non-destructive opening becomes a longer, more expensive job.

Superglue on a broken key

On another occasion, we came across a customer who had watched a video on using superglue to mend a broken key. He inserted the sticky key into the keyhole, and some of the glue got onto the lock’s internals, glueing the mechanism together. As it could no longer move, we had to break and remove the lock to open the door. A broken key extracted professionally usually leaves the lock intact; a glued one almost never does.

Kicking the door down

You may also have seen characters on television or in films kick doors down. This does not work. Although a door may seem fairly weak, we have met customers who have injured their feet and legs trying to kick one open. In some cases, they have twisted an ankle or fallen and hurt themselves. What’s more, replacing a broken door costs significantly more than engaging a locksmith.

Hitting the lock with a hammer

One suggestion we have seen in a social media group involves using a hammer to hit a lock. Hammering a lock will not unlock it, nor will it free a jammed one. Here is what is likely to happen: you miss the lock and put a hole in the door instead, or you hit the lock, and it bounces off and hits you (hopefully not in the face). When wielding a hammer with great force, there is also a risk that your grip slips and you drop the hammer on your foot.

The door itself is often the real problem

We were once called to a flat where a worker had installed an older-style lock, closed the door, and could not reopen it. The lock had to be broken off. The lock was not the fault. The door was sagging, and slight warping caused the frame to bite onto the latch so it could not release.

This is why we assess the door before fitting any lock: we check door gaps, hinge condition, and whether the door opens and closes smoothly, and we carry out door adjustment or repair before installation. A perfectly good lock fitted to a misaligned door could fail and jam the lock and door, potentially trapping someone in the room. This kind of assessment is part of our lock care and secure access work.

Replacement locks are rarely a like-for-like swap

Modern locks are not exact replacements for locks installed ten years ago. Backsets, spindle sizes, and screw positions differ between generations and brands, and thicker doors often need longer specialised fasteners or adaptors that do not come in the retail box.

We generally recommend buying locks from established local suppliers, as replacement parts and key blanks are far easier to obtain. With some imported locks, local suppliers may not stock the right key blanks or be able to cut duplicate keys at all, and non-standard fittings can leave you stuck when a part fails. If you are choosing a new lock, our guide on how to choose the best digital lock for your home walks through what to check before you buy.

Someone is locked inside

Being trapped in a room with no way out is genuinely stressful, especially for a child or an elderly family member. Opening the door may require dismantling the lock, manually pulling the deadbolt or latch clear of the frame, or in rare cases cutting into the door to clear an obstruction. If someone is shouting or crying inside, the pressure on everyone outside grows quickly. This is an emergency access situation, so call immediately rather than experimenting.

DIY or Locksmith? A Quick Decision Table

Part 3: Making the Smart Choice

While there is value in taking the initiative to build up your handyman skills, there is also wisdom in focusing on tasks that are relatively easy to perform and have a high chance of success, and in calling on the professionals for more complex lock needs.

Before you start any DIY lock repair, run through four questions:

• Cost: will a failed attempt cost more than the call-out? A damaged door usually does.
• Safety: could anyone end up trapped, or could you injure yourself?
• Skill and tools: do you have the right tools, or just the ones you happen to own?
• Urgency: is anyone waiting outside, inside, or late for something? Urgency makes mistakes more likely.

If you are unsure, send us a photo of the lock. We can often tell you in a message whether it is a five-minute fix you can manage yourself.

Locks may seem simple, but they guard what matters most. A loose screw or a misaligned latch can be a quick DIY fix, saving you time and money. But when the problem threatens your safety or requires specialised tools, calling a locksmith is the smarter choice. The bottom line: handle the small stuff yourself, and trust the professionals when security is on the line, so your home stays protected without unnecessary risk.

Frequently Asked Questions

Get Help With Your Lock Needs

For advice or to get help with your lock needs, please call or WhatsApp Nexus Locksmiths at 8758 2418. More than 500 satisfied customers have left us top reviews on Google Business. We look forward to helping you with your lock needs.

Nexus Locksmiths is a Singapore-registered and insured locksmith with hands-on experience across HDB flats, condominiums, landed homes, offices, and vehicles. Learn more about our team, or explore our emergency access, digital lock, vehicle access, and lock care services.