Can You Get Locked Out of a Smart Lock?

Smart locks are marketed around convenience—no more fumbling for keys, unlock from your phone, share temporary codes with guests. What doesn't always get mentioned is that smart locks introduce their own new ways to get locked out, on top of the traditional ones. If you're considering a smart lock, or you already have one, it's worth understanding the real failure points so you're not caught off guard.

Battery death is the most common failure point

Smart locks run on batteries, usually AA or a similar type inside the interior unit, and batteries wear down over months of motor use, wireless signaling, and keypad backlighting. Most smart locks send a low-battery warning through their app well before they die, but that warning is easy to miss if notifications are muted or the app hasn't been opened in a while. When the battery fully dies, the electronic locking and unlocking function typically stops working, even though the lock itself is physically intact.

App and wifi or connectivity failures

Locks that depend on a phone app, a home wifi network, or a smart-home hub for remote access add another dependency: if your internet is down, the hub loses power, or the app itself has a temporary outage, remote unlock may not work even though the lock's local functions (like a keypad code) might still be fine. This is a different kind of lockout than a dead battery—the lock has power, but the remote connection that lets you unlock it from your phone doesn't.

Code and keypad issues

Forgotten codes are one of the more human causes: a guest code that expired, a master code that was changed and not remembered correctly, or a keypad that's become unresponsive due to weather exposure or a worn keypad surface. Some locks also lock out code entry temporarily after several incorrect attempts, as an anti-tampering security feature, which can feel like the lock "isn't working" when it's actually functioning as designed.

Software glitches after an update

Like most connected devices, smart locks occasionally receive firmware updates from the manufacturer. Rarely, an update can introduce a bug that affects how the lock responds to app commands or keypad entry until a fix is pushed. This is uncommon but worth knowing about if a lock that worked yesterday suddenly behaves differently after an update notification.

Why manufacturers build in backup methods

Because these failure modes are known and common across the industry, most reputable smart lock manufacturers build in at least one backup method:

• A physical key cylinder — many smart deadbolts still include a traditional keyway as a backup, even though it's not the primary way most owners use the lock day to day
• External emergency power — some models have contact points on the outside keypad where a 9-volt battery can be touched briefly to power the lock long enough to enter a code
• A manual keypad code that doesn't depend on wifi — on many models, the physical keypad still works locally even if the app or internet connection is down

Knowing which of these your specific lock has—before you're standing outside locked out—is the single most useful thing you can do.

What to do if you're locked out of a smart lock right now

1. Check for a backup key — if your model has a physical key cylinder, this is usually the fastest fix
2. Try external emergency power — if your model supports it, a 9-volt battery held to the marked contact points can power the lock briefly
3. Confirm it's actually a network issue, not a dead lock — try the physical keypad code locally, since it may still work even if the app can't connect
4. Check whether the lock is unresponsive versus just not connecting remotely — a lock with a dim or unlit keypad usually points to a dead battery, while a lock that lights up but won't respond to the app points to a connectivity issue
5. Call a locksmith if none of the above works — a locksmith familiar with smart lock hardware can assess safe entry options without damaging the door or the lock

We don't cover bypass or defeat techniques here, since those steps depend on the specific hardware and are best handled in person by someone trained on that lock model—this guide focuses on what's happening and when it's time to call a professional.

Reducing the risk going forward

• Keep a physical spare key with someone you trust, not hidden near the door
• Don't ignore low-battery notifications—replace batteries proactively rather than waiting for a full failure
• Memorize your keypad code instead of relying solely on your phone
• If your lock depends on wifi for remote access, make sure your router and any smart-home hub have a stable power source

The takeaway

Yes, smart locks can lock you out—often for reasons that have nothing to do with a traditional lock: dead batteries, app or wifi outages, forgotten codes, or the occasional software hiccup. Knowing your specific lock's backup method before you need it, and keeping a physical spare key on hand, is the best way to avoid being stuck. If you're locked out and none of the built-in backups work, a locksmith familiar with smart lock hardware can help you get back in safely.

Call (408) 877-2177 for Lockout Help