The garage door reversal test: how to do it each month and what a failure means

The rule behind the test

Residential garage door openers made on or after January 1, 1993 for sale in the United States must meet a federal consumer product safety standard, 16 CFR 1211. It covers operators serving one- to four-family homes. The Consumer Product Safety Commission’s guidance for manufacturers, which we have not confirmed on the commission’s own page, is reported to say openers must comply with a mandatory standard, with certification on the product. The test in this guide comes from the owner instructions that the standard requires every opener to carry.

Those instructions say: “Test door opener monthly. The garage door MUST reverse on contact with a 1 1/2 inch object (or a 2 by 4 board laid flat) on the floor.” They add that the owner should retest after adjusting the force or the limit of travel.

How to do it

Do the test with the door fully open and nobody under it. Lay a 2 by 4 board flat on the floor in the middle of the opening, so the door will meet its wide face. Stand clear to the side, close the door with the opener’s wall button or remote, and watch.

The door should touch the board and travel back up. The standard asks for reversal to begin within 2 seconds of contact with an obstruction, then return the door to the fully open position. Do not try to time it. A clear reverse is the pass, and a slow, groaning stop is not. The standard’s own lab test uses a 1 inch object, and the owner instruction you follow at home uses the larger one, so use the board or a 1 1/2 inch object as the instructions say.

Pick a day, say the first of the month, and write it down. Retest after any change to the opener’s force or travel settings, as the instructions say. After any company visit, ask for the test to be run.

What a failure means

If the door does not reverse, or crushes the board before it goes up, or reverses only after a long delay, stop using the opener’s close function. DASMA says that if a door does not reverse readily after contacting an obstruction, the sensitivity may be set wrongly, which is dangerous, and it recommends that a trained door systems technician do that adjustment. Do not turn the adjustment screws and retest until it passes. DASMA adds that a heavy door is probably out of balance, and that a more powerful opener is not the answer.

Verdict: pro job after a failed test. DASMA recommends a trained door systems technician for the adjustment, so call a company. The opener repair page covers the visit.

The second protection: photo eyes

The federal standard also requires secondary entrapment protection for downward-moving doors. A vertically moving opener has to meet one of three options: a constant-pressure close control, a means of connecting an external secondary entrapment protection device such as a photoelectric sensor or an edge sensor, or approved inherent secondary protection. The protection circuits have to meet UL 991 or the entrapment supplement of UL 325.

DASMA says photo eyes should be no higher than six inches above the floor, and the wall button at least five feet above floors, landings, steps or adjacent walking surfaces, out of reach of children. It notes that since 1993 openers must include a second safety reversing feature such as photoelectric eyes. Check both heights in your garage. If the eyes sit higher than six inches, tell the company, and never bypass them. The safety sensors page and the guide on a door that will not close go further.

Old openers

The standard covers operators made on or after January 1, 1993, so an opener from before then was not required to carry the reversal feature. A Census share of homes built before 1980 appears on every city page, but the age of the house does not tell you the age of the opener. Read the label for a manufacture date. If it is older than 1993, or has no date, ask a company about replacing it, and see opener or new door for how to weigh that.

A recall, as an example

A recall shows what a failed safety feature looks like. In February 2023 the Chamberlain Group recalled about 96,400 LiftMaster myQ garage door control panels because the secondary entrapment protection could fail, so the door closes with an obstruction present. No injuries were reported in the United States. It is one example of a safety feature failing, not a trend. A keyword filter we ran on CPSC’s recall feed for October 2023 to October 2026 found no garage door opener recall, and that is our search, not CPSC’s statement.

The final-inspection list

DASMA’s code inspection checklist includes several items you can look at yourself: a manual release within six feet of the floor, a reversing mechanism tested, photoelectric eyes installed and tested, a control station at least five feet high, warning labels present, and torsion spring pads fastened to structural members. Ask a company to confirm those when it finishes work on an opener. DASMA’s schedule is monthly safety checks plus one visit a year from a trained door systems technician.

Who should do what

The monthly board test is the owner’s job, because the instructions put it there. Adjusting the opener’s force or travel limits is different. DASMA recommends a trained door systems technician for the sensitivity adjustment, and the federal instructions call for a qualified service person for cables and spring assemblies. A reasonable split is that you test and a company repairs. After a visit, ask the technician to run the test in front of you and say what was seen, so you know what a pass looks like on your own door.

Keep a small note near the opener with the date of each test and who last serviced it. The next technician can see at a glance what has been done. If you rent the home or manage it for someone else, give the tenant the same instructions.

What to do this month

Do the board test. Write the date. If it passes, note it and move on. If it fails, stop using the opener’s close function, keep children away from the door, and book a visit. The opener repair page says what price evidence we hold for that visit.