Smart Locks and Keyless Entry: Choosing, Installing and Fixing Them Right

What keyless entry includes today

Smart locks and keyless entry cover more ground than most people expect. On one end sits the mechanical pushbutton lock, a device with no batteries at all, where pressing the right combination releases a latch. On the other end is a deadbolt with a radio, a motor and an app that logs every entry and talks to your voice assistant. Most of what homeowners install falls somewhere in between.

• Electronic keypad deadbolts store codes in the lock and either drive the bolt with a small motor or let you turn it by hand after a valid code.
• Electronic keypad levers do the same job for a latch, which suits side doors, laundry rooms and offices.
• Connected smart locks add Bluetooth, Wi-Fi, Z-Wave, Zigbee or Thread so a phone or hub can manage them.
• Biometric locks read a fingerprint, almost always alongside a keypad.
• Retrofit units motorize the inside of a deadbolt you already own.
• Mechanical keyless locks use buttons, cams and springs, with no electronics to fail.

These categories overlap. A single lock might carry a keypad, a fingerprint reader, Wi-Fi and a key cylinder. The useful question isn't which category sounds most impressive but which methods of entry your household will actually use, and which ones you need as a fallback when the favorite method fails. That answer, more than any feature list on a box, should steer the purchase.

Codes, phones, fingerprints and cards: how people get in

Each way of opening a door has strengths and blind spots, and the right mix depends on who lives there.

Keypad codes are universal. Anyone can use one, they work without a phone, and you can text one to a plumber. Their weakness is spread: codes get written on sticky notes, passed to friends and outlive the reason they were issued. Locks that hold many individual codes, each with an optional schedule, keep that under control.

Phone access feels effortless when it works. Some locks open as you approach, using your phone's location and Bluetooth; others need a tap in the app. Apple's Home Key goes further, letting an iPhone or Apple Watch open a compatible lock with a tap, much like paying at a register. The trade-off is that phones die, get replaced and get borrowed by children.

Fingerprints can't be forgotten or casually shared, which appeals to families and to people who dislike memorizing numbers. For some users they're the least forgiving method, so a good lock treats them as one option among several.

Cards and fobs appear on some residential locks and most commercial systems. They're simple to hand out and simple to deactivate, but they get lost exactly like keys.

Most homes are best served by two methods: a primary one for everyday use, a different one as backup, and the mechanical key for the rare day both fail.

The radios inside: Bluetooth, Wi-Fi, Z-Wave, Zigbee, Thread and Matter

The wireless technology in a lock decides its battery life, its range, whether it needs extra equipment and which apps can control it.

• Bluetooth Low Energy links the lock directly to a nearby phone. It sips power, but the range is short, and remote control requires a bridge plugged in near the door that relays commands over your Wi-Fi.
• Wi-Fi puts the lock on your home network with no extra hardware. That convenience costs battery life, and most locks connect only on the 2.4 GHz band.
• Z-Wave is a low-power mesh radio that alarm and automation systems have used for many years. It needs a controller, and current devices support S2 encryption. Schlage, Kwikset and Yale have all sold Z-Wave versions of their locks.
• Zigbee is another mesh protocol with similar trade-offs. It's common in some hubs, though less common on locks than Z-Wave.
• Thread is a newer low-power mesh that needs a border router, a role played by several Apple, Google and Amazon home devices.
• Matter isn't a radio at all. It's a shared language that runs over Thread or Wi-Fi so one lock can answer to several ecosystems at once.

A useful rule of thumb: the fewer separate boxes your lock depends on, the fewer things can break. But if you already run a hub or a monitored alarm, joining that system usually beats adding yet another app to your phone.

Picking a platform you won't regret in three years

A good lock outlasts most phones, so plan for where your household is headed, not only where it is today.

Start with what you already own. If an alarm company monitors the house, ask which locks their panel supports before buying; many panels speak Z-Wave. If everyone carries an iPhone, Apple Home support, and possibly Home Key, will matter. Households that mix Android and iPhone benefit from Matter or from a brand app available on both systems. People who distrust cloud services can choose a Z-Wave, Zigbee or Matter lock controlled locally by a hub such as Home Assistant.

Next, think about dependence. Some locks route every remote command through the manufacturer's servers, and smart home companies do change course. Wink moved its users onto a paid subscription in 2020, and Insteon's servers went dark with almost no warning in 2022, leaving owners without app control until the service was revived under new ownership. A lock that keeps working fully at the door, with codes stored in the lock itself, shields you from that kind of surprise.

Finally, look closely at shared access. Can you add a user without handing over admin rights? Can codes run on a schedule? Are entry logs kept without a paid plan? Answers vary widely between brands and shift with firmware and app updates, so check current details before you commit to an ecosystem.

Will your door accept a smart lock?

Most residential smart deadbolts are built for a standard door prep: a 2-1/8 inch cross bore, a 1 inch edge bore, a backset of 2-3/8 or 2-3/4 inches, and a door roughly 1-3/8 to 1-3/4 inches thick. Many Southern California tract homes match that exactly. Plenty of doors don't.

• Mortise locksets, common in older homes and some custom builds, sit in a deep pocket cut into the door edge. Smart options exist, but they often need a conversion plate or a mortise-specific product.
• Steel security doors and wrought-iron screen doors leave little room for a bulky exterior keypad and can weaken wireless signals.
• Pairs of French doors, and doors with multipoint locks, need hardware made for them.
• Thick custom doors may call for an extended tailpiece or a different model.
• A security screen door in front of the entry may not leave clearance for the outside housing.

Fit is only half of it. The motor needs an easy path. If you have to lift or push your door to turn the deadbolt today, a motorized bolt will stall in the same spot tomorrow. Hinges, strike depth and weatherstripping all matter. That's why an assessment starts with turning your existing deadbolt with the door shut and paying attention to how it feels. A bolt that drags is a problem to solve before choosing any lock, not after the new one starts complaining.

Security: what a smart lock changes and what it doesn't

Physically, a smart deadbolt is judged like any other: by bolt strength, the quality of its housing, and above all by what it locks into. BHMA grades, printed on many packages, describe how the lock body performed in standardized testing. They say nothing about the strike plate or the wood behind it, which is where most forced entries actually succeed. A heavy strike fastened with long screws into the framing does more for kick resistance than any feature in the app.

Electronically, the realistic risks are mundane. Accounts protected by recycled passwords. Codes shared with people who no longer need them. Admin rights left with former partners or previous owners. Entry logs nobody reads. Exotic radio attacks make headlines, but a lock managed carelessly is far easier to defeat. Keep firmware updated, turn on two-factor authentication and prune your user list whenever life changes.

Two mechanical details deserve attention. First, the override cylinder: every keyed smart lock opens with its key regardless of the electronics, so that cylinder's pinning and key control matter. Rekey it when you take possession of a home. Second, the inside: your thumbturn must allow a quick exit in an emergency. Avoid any keyless setup that needs a code or key to get out, and don't install a double-cylinder deadbolt where it could trap people inside during a fire. California's building and fire codes expect exit doors to open from the inside without special knowledge or effort.

Smart locks in rentals and short-term stays

Rental owners adopted keyless entry early for a simple reason: codes are cheaper to change than cylinders. Doing it well in California takes a little care.

• Deadbolt requirement. Civil Code §1941.3 requires a deadbolt on each main swinging entry door of a rental unit, with a bolt that extends at least 13/16 of an inch beyond the strike edge of the door when locked. A smart deadbolt meets that only if its bolt throws fully, every single time.
• Entry notice. Under Civil Code §1954, landlords generally must give reasonable written notice before entering outside an emergency, and 24 hours is presumed reasonable. Holding a management code doesn't change that obligation.
• Protected tenants. In certain protective-order situations, Civil Code §1941.5 and §1941.6 require the landlord to change the locks within 24 hours of the tenant's written request. With a smart lock, that means new codes, removed users and a rekeyed override cylinder.
• Turnover. Delete every user, clear schedules, reset logs where the lock allows, and rekey the backup cylinder.

Short-term rentals add automation. Hosts want a code that activates at check-in, expires at checkout and never has to be typed by hand. That requires a lock compatible with the booking platform or management software, a stable connection at the door, and a fallback for the day the internet drops, usually a standing code known only to the host and a local co-host. Cleaners and maintenance vendors should have their own scheduled codes so the entry log tells a clear story if a guest ever disputes something.

Heat, dust, salt air and outages: Southern California conditions

Lock makers test across a stated temperature range, but that range describes air temperature, and a front door in July sun isn't air. Exterior housings on dark, west- or south-facing doors in the inland valleys get considerably hotter than the forecast high. The effects show up in predictable ways.

• Batteries. Heat speeds up chemical aging, so alkaline cells fade sooner. Some manufacturers prefer alkaline over lithium because lithium cells hold their voltage and then drop off quickly, leaving less warning. Follow the manual for your model.
• Displays and keypads. Touchscreens can be hard to read in glare, and rubber buttons stiffen or crack after a few summers.
• Doors. Steel and fiberglass doors bow toward the heat, enough to push the bolt against the strike in late afternoon.
• Dust. Santa Ana winds pack fine grit into fingerprint sensors and keyways.
• Salt. In coastal-influenced areas, contacts and fasteners corrode.

Power is the other regional issue. Utilities in Southern California may shut off power to high-fire-risk areas during dangerous wind events, and storms knock out service elsewhere. A battery-powered lock keeps working at the door, but routers, bridges and hubs go down with the grid, and remote access goes with them. If remote control matters to you during an outage, consider a battery backup for your network equipment or a hub that offers cellular backup.

Troubleshooting: symptoms and what usually causes them

Most smart lock trouble falls into a few recognizable patterns. Before calling anyone, these checks narrow things down.

• The bolt stops partway or the lock reports a jam. Open the door and operate the lock. If it runs smoothly with the door open, the strike or door alignment is the culprit. If it still struggles, suspect the bolt mechanism, the tailpiece or worn gears.
• Batteries die much faster than they used to. Look for a dragging bolt, a weak Wi-Fi signal that keeps the lock reconnecting, an auto-lock setting that fires too often, or heat exposure.
• The app shows the lock offline. Check the batteries, then whether the router, network name or password changed. Re-pair a Bluetooth bridge that was moved or unplugged.
• A code stops working for one person. Check whether it was scheduled, whether the lock's clock or time zone is wrong, or whether someone deleted it.
• The keypad ignores every input. The lock may be in a lockout period after repeated wrong codes, in privacy or vacation mode, or simply out of power.
• Auto-lock fires with the door open. The door position sensor needs recalibration, or its magnet has shifted.
• The key won't turn. The override cylinder is dry or dirty from years of disuse.

Treat a factory reset as a last resort. It wipes codes, users and integrations, and some locks need a programming code from the original packaging to finish the process.

Repair, replace or retrofit?

Smart locks are part mechanical device, part electronics and part software service, and each part ages on its own schedule. Deciding what to do with a problem lock comes down to a few questions.

Is the fault mechanical and outside the lock? Strike alignment, a sagging door, loose hinges and dragging weatherstripping can all be fixed without touching the lock. These are the most common causes and usually the least expensive to solve.

Is a replaceable part at fault? Many manufacturers sell interior assemblies, keypads, battery covers and cylinders separately. If the lock is current and supported, swapping the failed module is often sensible.

Is the platform still alive? A lock whose app has been discontinued, or that relies on a service its maker no longer supports, may still work as a keypad, but you've lost much of what you paid for. Replacing it with something on an active platform often makes more sense than repairing it.

Does the door suit the lock at all? Sometimes the honest answer is that the door, not the lock, is the problem: a bulky keypad behind a security screen door, a Wi-Fi lock at the edge of coverage, a mortise door forced to accept a cylindrical lock. Then the fix might be a retrofit unit on the inside, a different radio, or hardware designed for that door type.

We walk through these questions with you and price the realistic options before doing any work.

Where home smart locks stop and access control begins

Keypad and smart locks scale well up to a point. A small office with one or two doors, a handful of employees and a need to delete codes when people leave can run happily on standalone commercial keypad locks, many of which keep an audit trail you can download or view in an app.

Beyond that, a business usually needs access control: credentials such as cards, fobs or phone badges, readers at each door, electric strikes or magnetic locks, request-to-exit devices, and a controller or cloud service that manages schedules and users across every entry. Those systems involve door hardware, low-voltage wiring and life-safety considerations, including fail-safe or fail-secure behavior and fire alarm tie-ins on certain doors. Larger installs may bring in a licensed low-voltage contractor alongside the locksmith.

Signs you've outgrown standalone keypads:

• You manage more than a few doors and change users often.
• Different groups of people need different schedules.
• You want one place to see who entered which door and when.
• Your landlord, insurer or industry asks for formal access records.

Julian's Locksmith works on both sides of that line, so we can tell you honestly whether a keypad lever on the back door will do the job or whether it's time to plan an access control system with room to grow.

How we work and where we go

Julian's Locksmith is a mobile service based in San Bernardino, near Cal State San Bernardino. We bring the lock, the tools and the programming equipment to you, across the Inland Empire, the San Gabriel Valley, the Pomona Valley, north Orange County and southeast Los Angeles County.

A few things stay constant on every keyless job:

• We verify that you own or manage the property before installing, resetting or reprogramming a lock, or cutting override keys. For a home, that usually means ID with a matching address or closing documents; for a rental, a management agreement or the owner's written authorization.
• We quote before starting, with hardware and labor itemized, and requote if something about the door changes the job.
• We tell you when another trade fits better, whether that's an electrician for a powered gate operator, a low-voltage contractor for networked access control, or your alarm company for a panel change.

Our California locksmith company license is LCO7891, issued by the Bureau of Security and Investigative Services, and you can verify it at search.dca.ca.gov. Our hours are 6:30 a.m. to 11:30 p.m., every day. We're closed between 11:30 p.m. and 6:30 a.m. Call (951) 903-3193 to describe your door, the lock you have in mind and the people who need to get in, and we'll take it from there.