Awaiting expert review. This page covers safety or regulatory rules that change over time. It is kept out of search results until a qualified reviewer has checked it; the sources below are dated so you can verify each point.
Quick answer
Garage door entrapment protection is the set of required safety features on an automatic opener that make a closing door reverse when it meets a person or object, so no one is pinned underneath.
Federal law (16 CFR 1211) requires two layers on residential openers: an inherent reversing system and a second safeguard such as photo-eyes or an edge sensor. Owners should test them monthly.
Quick facts
The key facts about Entrapment Protection, with sources:
Key takeaways
- Entrapment means being caught under a closing door. Openers must be built to prevent it.
- Openers made since 1993 need two independent layers: inherent reverse plus a second device.
- The inherent layer must start reversing within 2 seconds of touching an obstruction.
- Photo-eyes must sit with the beam no higher than 6 inches above the floor.
- Test monthly. Never disable, bypass or tape over a safety device.
What entrapment protection means
DASMA defines entrapment as the condition when a person is caught or held in a position that increases the risk of injury 8. Under a garage door, that means being pinned by a heavy door driven by a motor.
The danger is not theoretical. In a December 1991 release, CPSC reported 48 children aged 2 to 14 who had died after being trapped under doors with automatic openers since 1982 4. Congress responded in 1990 with Public Law 101-608, which made entrapment protection a federal requirement 5.
Today the rule is 16 CFR Part 1211, which CPSC describes as a mandatory federal consumer product safety standard 3. It requires inherent primary entrapment protection on every residential opener and, for vertically moving doors, a second layer 2.
How the layers work together
Layer 1: inherent primary protection. Built into the opener itself. For a vertically moving door, the opener must start reversing within 2 seconds of contact with an obstruction (other than in the first foot of travel from fully open), then return the door to fully open 2.
In the lab, the obstruction is a 1-inch-high solid object on the floor 2.
Layer 2: secondary protection. For vertically moving doors, the opener must use one of three approaches: constant-pressure close only (hold the wall button, and the door reverses if you let go), a connection for an external secondary device, or an inherent secondary system on a combined door-and-opener package 2.
External devices include a photoelectric sensor that reverses a closing door and keeps an open door from closing, or an edge sensor on the door’s bottom edge 2.
The opener must check that the external device works. DASMA says the opener must monitor the external sensor at least once each cycle; if the sensor is not working, the door may only close by constant pressure on a wall control, not by a remote 9.
- Inherent reverseOpener senses contact; reverses within 2 seconds 2
- Secondary devicePhoto-eye or edge sensor reverses before or on contact 2
- MonitoringOpener checks the device every cycle 9
- Controls and labelsWall button 5 ft up, in sight of the door; warning label 9
- Owner testingMonthly reversal and photo-eye test 7
Types of entrapment protection devices
| Device | How it works | Layer |
|---|---|---|
| Inherent reversing system | Opener senses resistance and reverses 2 | Primary |
| Through-beam photo-eye | Emitter on one side, receiver on the other 7 | Secondary |
| Retro-reflective photo-eye | Emitter and receiver in one unit, reflector opposite 7 | Secondary |
| Edge sensor | Bottom-edge strip that signals on contact 8 | Secondary |
| Constant-pressure control | Door closes only while the button is held 2 | Secondary option |
| Inherent secondary system | Whole door-and-opener package senses force 6 | Secondary |
Example: the federal timeline in four dates
Dates from Public Law 101-608, 16 CFR 1211 and CPSC 5 2 4.
| Date | What happened | Source |
|---|---|---|
| Nov. 16, 1990 | Congress passes Public Law 101-608, Section 203 on garage door openers | Statute 5 |
| Jan. 1, 1991 | New openers must meet UL 325 (3rd ed.) entrapment requirements | Statute 5 |
| Dec. 3, 1991 | CPSC reports 48 child deaths since 1982 and urges replacing openers without auto-reverse | CPSC 4 |
| Jan. 1, 1993 | Openers must add a second entrapment safeguard; 16 CFR 1211 applies from this date | Statute and rule 5 2 |
| May 13, 2024 | Latest update to 16 CFR 1211 takes effect, adopting UL 325 revisions through Feb. 21, 2023 | CPSC rule 1 |
- 2 secondsMaximum time to start reversing after contact16 CFR 1211.7
- 1 inchHeight of the lab test obstruction on the floor16 CFR 1211.7
- 6 inchesMaximum photo-eye beam heightDASMA TDS-364
- 48Child deaths reported to CPSC, 1982–1991CPSC, Dec. 1991
An opener made before 1993 may have no second layer at all, and one made before 1991 may lack auto-reverse. Our pre-1993 opener study and UL 325 timeline go further.
Where to find it on your opener
Look for the photo-eyes: two small boxes near the floor on each side of the door, usually with indicator lights. DASMA says the beam should be no higher than 6 inches above the floor and the sensors within 6 inches of the door’s path 7.
Check the label on the opener for a manufacture date and a UL listing mark or a statement of compliance with UL 325 or federal standards. DASMA says that is how to tell a compliant opener made after January 1, 1993 6.
Near the wall button you should find an entrapment warning label. DASMA’s checklist says the button should be in clear view of the door, at least 5 feet above the floor and away from moving parts 9.
The monthly owner test
The monthly reversal and photo-eye tests are the owner checks DASMA and the federal rule describe. If the door fails either one, stop using the opener and call a technician.
- Reversal test: lay a 2x4 flat on the floor, centered under the door. Close the door with the opener. It must reverse when it touches the board 9.
- Photo-eye test: start the door closing, then pass an object through the beam. The door must reverse and return to fully open 7.
- Look at the photo-eyes: lenses clean, both lights on, beam no higher than 6 inches 7.
- Confirm the door is level with the floor; DASMA says gaps keep reversal from working across the width 9.
- 2x4 reversal test passed
- Photo-eye interruption reverses the door
- Photo-eye lights on, lenses clean
- Wall button 5 ft up and in sight of the door
- Red manual release handle present
- Warning labels in place
What it protects and where it can fail
Protects against
- A closing door pinning a child, adult or pet.
- A door closing on a car or object in the opening.
- Unattended closing without warning: remote-close features need alarms and photo-eyes 9.
What entrapment protection cannot do
Entrapment protection does not make a moving door safe to play near. Owner materials still say to keep people clear while the door moves, and the wall button belongs out of children’s reach 9.
It depends on the door. DASMA says safe operation depends on a balanced door, a working opener and working entrapment protection together 10. An unbalanced door makes the opener work harder and can mask a weak reversal.
It does not apply to older openers. The federal standard covers openers made on or after January 1, 1993 2. Older units may lack the second layer, and pre-1991 units may lack auto-reverse 5.
What drives the cost of fixing entrapment protection
No prices on this page; see the cost guide.
What a technician does on a service call
- Tests the opener’s reversal on a 1-inch or 2-inch block, per the maker’s instructions, and records the result 6.
- Checks photo-eye height, alignment and monitoring 7.
- Checks door balance and that the door sits level on the floor 9.
- Adjusts settings per the manual so force is the minimum needed to run the door reliably 9.
- If the opener cannot be made to reverse, advises repair or replacement in writing 6.
Keeping the safety systems working
Warning signs
Danger signs: the door does not reverse on the 2x4, the door closes with something in the beam, photo-eye lights blink or are off, the door only closes when you hold the wall button, or the opener is older than 1993. Stop using the opener as an automatic until it is fixed.
If you have an opener with no auto-reverse, CPSC’s advice has been blunt since 1991: replace it 4.
Never bypass a safety device
Do not tape photo-eyes together, mount them high, jumper their wires or raise force settings to make a door close. These are federal safety systems that stop a door from crushing a person. If the door will not close normally, call a technician.
The law in detail
Federal. Public Law 101-608 § 203 required new openers to meet UL 325 entrapment rules from January 1, 1991, and additional entrapment protection from January 1, 1993 5.
16 CFR Part 1211 is the current rule; it covers openers serving buildings of one to four single-family units, rated 600 volts or less 2.
CPSC requires on-product certification as well as a General Certificate of Conformity 3.
Unattended close. Timer-to-close and app-close features are allowed only on sectional doors, with a secondary device such as a photo-eye, and with audible and visual alerts for 5 seconds before the door moves 9 2.
States. DASMA summarizes extra state rules: California, Indiana, Minnesota and New York require installers and servicers to test reversal and tag non-compliant units 6.
Entrapment protection vs related terms
| Term | What it is | Relationship |
|---|---|---|
| Entrapment protection | The whole required safety system | Umbrella term |
| Automatic reversal | The inherent primary layer | Required on all openers 2 |
| Photo-eyes | Most common secondary device | One way to meet layer 2 2 |
| Force setting | How hard the opener pushes before reversing | Set to the minimum needed 9 |
| UL 325 | The safety standard behind the rule | Incorporated by reference 2 |
Myths about garage door safety systems
- Myth Photo-eyes are optional.
- Reality For most residential openers since 1993, a second layer is required and the opener checks it 2 9.
- Myth Mounting photo-eyes higher stops false trips.
- Reality DASMA says never higher than 6 inches, so a small child cannot crawl under the beam 9.
- Myth If it reverses on a car, it is fine.
- Reality The test is a 2x4 laid flat, about 1-1/2 inches high, at the center 9.
State differences
What to do today
Run the 2x4 test and the photo-eye test. If either fails, or your opener predates 1993, plan a repair or replacement and stop using it as an automatic until then. Use the opener selector to compare replacements, and see what a professional opener job includes.
Check the manufacture date
Find the date label on the opener. Anything made before January 1, 1993 was not built to today’s two-layer rule.
Questions about Entrapment Protection
What is entrapment protection on a garage door opener?
The required safety system that makes a closing door reverse when it meets a person or object. Federal law requires an inherent reversing system plus a second safeguard, such as photo-eyes or an edge sensor, on residential openers made since 1993.
What does 16 CFR 1211 require?
It requires residential openers made on or after January 1, 1993 to reverse within 2 seconds of contacting an obstruction and, for vertically moving doors, to have a secondary entrapment protection method such as an external sensor or constant-pressure close.
How do I test my garage door safety reverse?
Lay a 2x4 flat on the floor centered under the door and close it with the opener. Contact with the board has to make it reverse. Then start it closing and break the photo-eye beam; it must reverse. Test monthly.
How high should garage door safety sensors be?
No more than 6 inches above the floor, so a small child cannot crawl under the beam, and within 6 inches of the door’s path. Both limits come from DASMA.
Why will my garage door only close if I hold the button?
Often the opener has detected a problem with the photo-eyes. DASMA says that when an external sensor is not working, the door may only close by constant pressure on a wall control. Check the sensors and call a technician if needed.
Are old garage door openers dangerous?
Openers made before 1993 may lack the second safety layer, and those made before 1991 may not auto-reverse. CPSC advised replacing openers without automatic reversal immediately.
Can I disable the photo-eyes?
No. They are part of a federally required safety system. Disabling or bypassing them removes protection against a door closing on a person.
Is timer-to-close legal?
Yes, under conditions. Unattended close features are allowed only on sectional doors with a secondary device such as a photo-eye, and with audible and visual alerts for 5 seconds before the door moves.
Sources
- Federal Register 89 FR 18538 (Mar. 14, 2024), CPSC direct final rule amending 16 CFR 1211 to UL 325 revisions through Feb. 21, 2023, retrieved .
- 16 CFR Part 1211, Safety Standard for Automatic Residential Garage Door Operators (eCFR, current), retrieved .
- U.S. CPSC, FAQ: Automatic Residential Garage Door Operators (16 CFR 1211 certification), retrieved .
- U.S. CPSC news release, Government and Industry Move to Reduce Garage Door Opener Child Entrapment Deaths (Dec. 3, 1991), retrieved .
- Public Law 101-608 § 203 (Nov. 16, 1990), Automatic Garage Door Openers (15 U.S.C. 2056 note), retrieved .
- DASMA Technical Data Sheet #351, Federal and State Garage Door Operator Legislation Guidelines for Dealers and Installers, retrieved .
- DASMA Technical Data Sheet #364, Installation Location of Photoelectric Sensors on Residential Garage Doors, retrieved .
- DASMA Technical Data Sheet #368, Edge Sensors, retrieved .
- DASMA Technical Data Sheet #369, Frequently Asked Questions Regarding Automated Residential Garage Door Systems, retrieved .
- DASMA Technical Data Sheet #167, Residential Sectional Garage Door and Electric Operator Checklist for Home Inspectors and Consumers, retrieved .
Expert review
Written by the HyreGarage Research team. Not yet reviewed by an outside expert. We say so rather than imply a review that has not happened; see our editorial policy.
How the numbers were checked: Requirements from 16 CFR 1211 (eCFR, current) and Public Law 101-608 § 203; history from CPSC (Dec. 1991); device and testing guidance from DASMA TDS-351, 364, 368, 369 and 167. Held for review by a qualified safety professional.
Suggest a correction. We fix errors and say what changed.