Garage Door Auto-Close Timer (TTC): How It Works, UL 325 Safety Rules & How to Enable It on LiftMaster, Chamberlain and Genie

The Feature Most Homeowners Have Already Paid For and Never Turned On

It is one of the most common service calls we hear about second-hand: a London homeowner pulls into the driveway, unloads the groceries, walks into the house, and leaves the garage door wide open for the next three or four hours. Sometimes it stays open overnight. By morning the homeowner has a wet garage floor, a flat of seedlings the squirrels found, or in the worst case, a missing bicycle and a police report.

Every modern garage door opener sold in Canada in the last several years can stop this on its own. The feature is called Timer-to-Close, often abbreviated TTC. On older LiftMaster wall panels it is a hardware feature with three fixed settings - 1, 5 or 10 minutes - that you enable with a single button press. On modern Wi-Fi connected openers from LiftMaster, Chamberlain, and Genie, the same idea lives inside the smartphone app as a duration rule or a recurring schedule, and you can dial it to any time you want.

This guide explains exactly what TTC is, why ANSI/CAN/UL 325 requires the audible and visual warnings that accompany an unattended close, and the precise step-by-step setup on the three brands you are most likely to have in a London-area garage. Every external link in this article was verified live the morning it was published.

What Timer-to-Close Actually Does

Timer-to-Close is a programmable feature that starts a countdown the moment your garage door reaches the fully open position. When the countdown expires, the opener triggers a visual and audible warning, then closes the door. The countdown resets every time the door is reopened. The most common factory-set durations are 1 minute, 5 minutes, and 10 minutes on the basic LiftMaster wall panel. On app-based systems, the duration is normally set by the homeowner in any whole-minute increment from 5 to 60 minutes, and on some systems it can be tied to a specific time of day rather than a count of minutes.

TTC is what the industry calls an unattended close. The homeowner is not standing in front of the door watching it move; the opener is making the decision on its own. Unattended close is the reason every modern compatible opener also requires monitored photoelectric safety sensors. If the beam is broken at any point during the close, the door must reverse immediately. The standard that governs all of this in Canada and the United States is ANSI/CAN/UL 325, the same standard that gave us mandatory photo-eye sensors in 1993. Underwriters Laboratories tells the full history in its UL 325 50th anniversary key safety issues article.

The UL 325 Rule You Have to Know Before You Enable TTC

The 2016 and 2018 revisions of UL 325 (Seventh Edition) tightened the rules for any garage door operator that can close the door without an operator present. The U.S. Consumer Product Safety Commission codified the same updates in 16 CFR Part 1211, and published the rule change in the Federal Register on July 13, 2018, with an effective date of September 11, 2018. The Canadian equivalent enforcement comes through ANSI/CAN/UL 325, which is referenced by the National Building Code provisions adopted into Ontario's Building Code.

The rule that matters for homeowners has three parts:

• Five-second audible warning. Before any unattended close, the opener must sound an audible alert that can be heard inside the confines of the garage for at least five seconds.
• Five-second visual warning. A visible flashing light must run for the same five seconds. On almost every modern residential opener this is the work light on the motor head itself, which flashes for the warning interval before the door starts to move.
• Monitored entrapment protection. The photo-eye safety sensors must be wired through a monitored circuit. If a sensor is dirty, misaligned, disconnected, or its wire is cut, the opener cannot use TTC at all until the fault is fixed. This is also why TTC will not work with most pre-1993 openers (which predate photo-eyes entirely) and will not work on any opener showing a sensor fault.

You do not need to wire any of this yourself. Every UL-listed opener sold in the last several years already has the audible and visual warning built in; enabling TTC simply switches it on. But the rules tell you what to expect: when TTC is enabled, your door will flash and beep for five seconds before it closes. That is by design and it is not optional.

UL 325 is also the reason TTC is only permitted on sectional garage doors, never on one-piece (tilt-up) doors. The published LiftMaster 881LMW/882LMW/886LMW installation instructions repeat this warning on the first page of the TTC section. If you have an older one-piece door, do not enable TTC. Replace the door first; our door types guide covers the differences.

How to Decide: Hardware TTC vs Smartphone App Schedule

Most Canadian homeowners have one of two options available:

1. Hardware TTC on the wall control panel. Available on millions of LiftMaster and Chamberlain openers with a compatible motion-detecting wall panel (the LiftMaster 881LMW is the most common in our service area). Fixed settings of 1, 5, or 10 minutes. Works whether or not your opener is connected to Wi-Fi. No app required.
2. Software-based schedules in the manufacturer app. Available on any Wi-Fi connected opener via the myQ app (LiftMaster, Chamberlain, Craftsman) or the Aladdin Connect app (Genie). Fully customizable duration, plus the option to use a time-of-day schedule (close every night at 10 PM) instead of a count-up timer.

The two options are not mutually exclusive. Many homeowners enable hardware TTC at 5 or 10 minutes for the routine catch-the-mistake case, and add a nightly app-based schedule at 10 PM as a second safety net. Both will close the door once; the second event is harmless because the door is already closed.

A quick comparison:

• Hardware TTC pros: Works without internet, works during a Wi-Fi outage, easy one-button setup, audible feedback on the wall panel.
• Hardware TTC cons: Only three duration choices, requires a TTC-capable wall control (the original simple white wall button does not have it).
• App schedule pros: Any duration, multiple schedules, can be paused remotely, push notification when the door closes.
• App schedule cons: Depends on Wi-Fi and the manufacturer's cloud service being up, requires initial app setup.

How to Enable Hardware TTC on a LiftMaster 881LMW (and Most Compatible Wall Controls)

The 881LMW Wi-Fi Motion-Detecting Control Panel with Timer-to-Close is the most common TTC-capable wall control on residential LiftMaster and Chamberlain openers installed in the last ten years. Its product page on liftmaster.com lists the procedure and links the official installation manual. The same procedure works on the 882LMW and 886LMW.

Step 1: Verify your wall control is TTC-capable

Look at the wall panel beside the door from the garage into the house. If it has three small LEDs labelled 1 min, 5 min, 10 min and dedicated ON, OFF, and HOLD OPEN buttons in addition to the large door-control button, you have a TTC-capable panel. If you have a simple round-button panel with no LEDs, your wall control does not support hardware TTC. You can buy a replacement 881LMW for about $35 at any garage door dealer, Home Hardware, or Canadian Tire, and install it yourself (it uses the same two-wire bell connection as the basic panel).

Step 2: Enable TTC

Press and hold the ON button until one of the three TTC duration LEDs lights up. Release the button. The first press selects 1 minute. To choose a different duration, press the ON button again briefly to cycle through 1 minute, 5 minutes, and 10 minutes. The garage door opener work lights will blink as confirmation that the new TTC duration is saved.

Step 3: Test the warning sequence

Open the garage door and walk out of the path. After the chosen number of minutes elapses, the opener will: (a) flash its work light for about five seconds; (b) sound an audible buzz from the motor unit for the same five seconds; (c) close the door fully. If you see and hear the warning sequence, TTC is enabled correctly. If the door does not move after the warning, the photo-eye sensors are reporting a fault and TTC will not run until they are fixed; see our photo-eye sensors alignment guide and our sensor wire diagnosis guide.

Step 4: Pause TTC when you need to

If you are working in the garage and want the door to stay open for the afternoon, press and release the HOLD OPEN button on the wall panel. TTC is suspended until you press HOLD OPEN again to release it. Do not just leave the door open and assume TTC will not close it on top of your project; the timer keeps counting from the moment the door reached fully open, not from the moment you stepped inside.

Step 5: Disable TTC if you ever need to

Press and hold the OFF button on the wall panel until all three duration LEDs go dark and the motor unit beeps. TTC is now disabled and the door will only close when you press the wall button, hit a remote, or use the app.

How to Set Up an Auto-Close Schedule in the myQ App (LiftMaster, Chamberlain, Craftsman)

If your opener is one of the Wi-Fi connected models (the built-in Wi-Fi has been standard on LiftMaster and Chamberlain residential openers for several years, and the Smart Garage Hub retrofits the same features onto older units), you can use the myQ app to schedule the door to close at a specific time of day. The official support portal that covers app setup and troubleshooting is at support.chamberlaingroup.com.

Step 1: Verify the door is paired

Open the myQ app and confirm your garage door appears in the device list and the open/close status is current. If the door is offline, fix the Wi-Fi connection first; the app cannot schedule an offline door. Our Wi-Fi opener guide covers the basics of getting connected.

Step 2: Open Schedules

In the myQ app main menu, tap Schedules, then tap the plus icon in the top-right to create a new schedule.

Step 3: Name and add the door

Give the schedule a recognisable name (for example, "Nightly Close"). Tap Add Device and select your garage door from the list.

Step 4: Set the time and the action

Tap Time and pick the time you want the door to close (10:00 PM is a common choice). Confirm the time zone (Eastern Time for London, Ontario). Then set the action to Close.

Step 5: Choose the days

Tap Day and pick the days of the week the schedule should run. All seven days is the default and is what most homeowners want. If you want a different schedule on weekends (later close time on Friday and Saturday, for example), create a second schedule with the different time and the weekend-only days.

Step 6: Save and verify the first run

Save the schedule. On the first scheduled run, you will get a push notification on your phone in the few minutes before the door closes, then a second one confirming the close. If the door is already closed at the scheduled time, the app recognises that and does nothing; the schedule is a backup, not a forced-close. As with hardware TTC, the warning beep and the flashing work light will run for five seconds before the door starts to move, satisfying the UL 325 rule.

How to Set Up Auto-Close on a Genie Aladdin Connect Opener

Genie's app-based equivalent is Aladdin Connect, which is built into every modern Genie smart opener and is also available as a retrofit kit for older Genie units. The product page is at geniecompany.com/aladdin-connect-by-genie, and the support landing page is at support.geniecompany.com. Aladdin Connect offers two distinct auto-close models that you can run separately or together.

Option A: Duration Rule (the count-up timer)

A Duration Rule closes the door if it has been open continuously for longer than a specified period. This is the direct equivalent of hardware TTC: as soon as the door reaches fully open, the countdown starts; if the door is still open when the countdown ends, the door closes. To set it up, open the Aladdin Connect app, tap Rules in the menu, tap the plus icon, choose Duration, set the door, set the duration (5 minutes, 30 minutes, 1 hour are common), pick the days, and choose the action. Aladdin Connect offers three actions: Close (close the door silently), Close and Notify (close the door and send a push notification), or Notify Me (just tell you the door is open, without closing it). Most homeowners pick Close and Notify on a 15-minute or 30-minute rule.

Option B: Scheduled Close Time (the nightly catch)

Scheduled Close Time runs every day at a specific time of day, regardless of how long the door has been open. To set it up, tap Schedules instead of Rules, tap the plus icon, pick the time, pick the days, and save. Most Canadian homeowners with kids set this for somewhere between 10 PM and midnight as the nightly catch-all backup.

Both at once

You can run a Duration Rule and a Scheduled Close at the same time. The Duration Rule handles the daytime case where the door is left open for an hour while you are inside; the Scheduled Close handles the rare overnight case where someone hit the open button just before bed and forgot.

What If My Opener Is Older?

If your opener is not Wi-Fi connected and your wall control is the basic round-button panel, you have three options ranked from least to most expensive:

• Upgrade the wall control to a TTC-capable panel. A LiftMaster 881LMW or compatible panel (any Security+ 2.0 LiftMaster or Chamberlain opener built since about 2014 will accept one) costs about $35 to $50 in the London market and is a 10-minute install. This gets you 1/5/10 minute hardware TTC.
• Add a Wi-Fi bridge to an existing opener. The Chamberlain Smart Garage Hub or Genie Aladdin Connect Retro-Fit Kit adds full app control (including schedules) to an opener that does not natively have Wi-Fi. Cost is about $50 to $90 in Canada. The retrofit kits work with most openers built since the late 1990s as long as the safety sensors are functional and monitored. Our smart home integration guide covers compatibility in detail.
• Replace the opener. If your opener is older than 15 years, has a metal chain drive, lacks battery backup, or is approaching the end of its working life anyway, the smart move is often a full replacement to a modern Wi-Fi unit that includes TTC, battery backup, and a compliant monitored safety system out of the box. Our when to replace your opener guide covers the seven warning signs.

One important note: openers manufactured before January 1, 1993 do not have monitored photoelectric safety sensors and therefore cannot be made UL 325 compliant. They cannot use TTC under any circumstances, and they should be replaced regardless. The history of why is in the UL 325 50th anniversary article cited above.

The Safety Habits to Pair With TTC

TTC reduces the risk of leaving the door open, but it does not eliminate it. A few habits pair well with the feature and make it safer:

• Run the DASMA-recommended monthly safety test. The Door & Access Systems Manufacturers Association maintains the residential safety checklist that every Canadian homeowner should run, available on its garage door safety tips page and detailed in our monthly safety test guide. A door whose auto-reverse is not working should never be on a TTC schedule.
• Clean and check the photo-eye sensors twice a year. Cobwebs, road salt, and pollen all reduce signal strength. TTC will not run if the monitored sensor circuit is reporting a fault. Step-by-step in our photo-eye guide.
• Never enable TTC if children, pets, or contractors are using the garage unsupervised. A door that closes by itself, even with five seconds of warning, is not appropriate where someone might not hear the warning. Our child safety guide covers the full picture.
• Use the HOLD OPEN button (or pause the schedule) during yard work or moving days. The 881LMW HOLD OPEN button suspends TTC indefinitely; in the myQ and Aladdin Connect apps you can pause a schedule from the device settings.
• Make sure the door is reversing properly first. Our bottom bracket safety guide and monthly safety test cover the auto-reverse test. TTC should never be enabled on a door whose auto-reverse is intermittent.

Costs in 2026 Ontario

Prices on this page are before HST.

For homeowners weighing this against other upgrades:

• TTC-capable wall control retrofit (parts only): $35 to $50 for the 881LMW; $40 to $70 for the multi-function 882LMW with battery backup status; 10 to 15 minutes of installation time. DIY-friendly.
• Wi-Fi retrofit kit (parts only): $50 to $90. About 20 minutes to install. DIY-friendly for most users.
• Replacement smart opener (installed): $750 to $1,050 in the London market in 2026 depending on horsepower, drive type, and battery backup features. Our horsepower guide and battery backup guide cover what to look for.
• Service call to diagnose a non-working TTC (typical): $85 for the visit. Reseating sensor wiring is usually done within it; a replacement sensor pair is $125 to $250 all in. If the issue is that the photo-eyes are not properly monitored, the fix is normally the same as for any other photo-eye fault.

Frequently Asked Questions

Why does my LiftMaster opener beep for five seconds before the door closes?

That is the UL 325 mandated audible warning. Any unattended close (TTC, app-based schedule, voice assistant command from a different room) must be preceded by a five-second audible and visual alert. It is not optional and it is not adjustable. The full rule is in 16 CFR Part 1211.

Can I make TTC quieter? My garage shares a wall with a bedroom.

No. The beep is required by code and the volume is set at the factory to a level that meets the UL 325 sound-level requirement (45 dB at 10 feet). You cannot legally disable or muffle it. If the beep is a real problem, the practical workarounds are: (a) set TTC for a time when no one is sleeping, or (b) move the opener motor head and its work-light buzzer further from the shared wall (a service call can sometimes reposition the motor by a foot or two without much expense).

Can I use TTC with Alexa, Google Assistant, or Apple HomeKit voice commands?

Voice commands to close the door always work (closing is permitted with the same UL 325 warning sequence), but you cannot use a voice command to open the door from outside the home without a security code on most platforms. The Matter standard, available on newer LiftMaster myQ openers, is changing this; our smart home integration guide covers the current state of voice support across brands.

My door starts to close, the sensors trigger an obstruction, and the door reverses. Does the TTC timer reset?

Yes. The countdown restarts from zero when the door returns to fully open. This is intentional: it gives a homeowner who walked under the closing door a second chance to clear the area before the next close cycle.

Will TTC close the door on a car that is half-parked under it?

It should not. If the rear of the car is sitting in the safety beam path (somewhere between 4 and 6 inches off the floor, depending on installer setup, per DASMA TDS #364), the door will reverse before contact. If the car is parked far enough forward that the beam is clear but the trunk is still under the door path, the door can hit the trunk. The fix is to park the car fully inside the garage or fully outside, never straddling the door opening.

The door closes, but my Wi-Fi is slow. Will TTC time out?

Hardware TTC on the 881LMW does not use Wi-Fi at all and is unaffected by your internet connection. App-based schedules on myQ and Aladdin Connect do depend on the manufacturer cloud, but the cloud commands fail safe: if the cloud is unreachable, the door simply does not close. It does not accidentally close at the wrong time.

Can I set TTC to a duration shorter than 1 minute?

No. The minimum on the 881LMW hardware is 1 minute and the minimum on most app schedules is 5 minutes. UL 325 also implicitly prevents shorter durations because the five-second warning is mandatory and a very short TTC duration would leave almost no useful open time before the close starts.

Does TTC work during a power outage?

Only if your opener has a battery backup. Modern LiftMaster Wi-Fi openers and some Genie units include built-in battery backups that keep TTC running through short outages. Our battery backup guide covers what is available. During an extended outage, use the manual release rope and our manual release guide instead.

What happens if my photo-eye sensors fail while TTC is enabled?

The opener detects the sensor fault, refuses to close the door automatically, and either flashes a fault code on the wall panel or sends an alert through the app (or both). The door will not close from TTC, from the app, or from a remote until the sensor fault is fixed. The door can still be operated by holding the wall button down for the full close cycle (the constant-contact override), which provides human attention as an UL 325 substitute for the sensor check. Diagnose with our photo-eye guide and sensor wire guide.

I have two garage doors. Can each have its own TTC?

Yes. Each opener has its own wall control and its own TTC settings, and each can be added as a separate device in the myQ or Aladdin Connect app with independent schedules. Different doors can run different rules (for example, the single car door for daily commuter use on a tight 5-minute timer; the double car door on a longer 30-minute rule because that one tends to stay open for unloading the SUV).

Is the audible alert the same on every brand?

The duration (5 seconds) and the sound-level requirement (45 dB at 10 feet) are standardised by UL 325, but the actual tone differs by brand. LiftMaster motor heads typically use a soft repeated beep. Genie uses a similar beep. The Chamberlain Group support portal at support.chamberlaingroup.com has audio samples for each model. If you live with someone who is hard of hearing, lean on the visual flash rather than the audible tone; the work light flashing for five seconds is visible across most garages.

Conclusion

Timer-to-Close is the most underused feature on modern garage door openers. It is built into hardware you already paid for or available as a free app feature on any Wi-Fi connected opener, and it eliminates the single most common preventable garage problem in our service area: a door left open by accident. The cost to enable it is zero if you already have the right wall control, about $35 if you do not, and a few hours of installation labour if you are upgrading the opener at the same time.

Before you enable TTC, make sure the photo-eye sensors are clean and aligned, the door auto-reverses properly on the monthly safety test, and the household members who share the garage know what the five-second warning sounds and looks like. With those boxes checked, TTC is one of the best peace-of-mind upgrades in the entire opener product line.

If you would like a hand setting it up, swapping in a TTC-capable wall control, or diagnosing why TTC is not working on an opener you already own, our service team has been doing this in London-area homes since 2009. Our service record is public on our BBB profile, and we are happy to walk a homeowner through the setup over the phone.