An automatic door is the only piece of equipment in most buildings that moves on its own, in a doorway, around people who are not paying attention to it. That is why it sits under a safety standard rather than a maintenance recommendation, and why the annual inspection is not optional paperwork.

Most facility managers find this out the hard way: the door has been running for years, nobody has touched the sensors, and then an incident report or an insurer’s questionnaire asks for the last inspection record and there isn’t one. Here is what the inspection actually covers, and what commonly fails.

The two families of automatic door, and why it matters

The requirements differ depending on how the door moves, so the first thing any inspection establishes is which type you have.

Low-energy swing doors

These are the operators you see on washroom doors, accessible entrances and interior vestibule doors. They open slowly, they are usually activated by a push plate or wave plate, and the opening and closing speeds are deliberately limited so that the door itself cannot do much harm. Because the energy is low, these doors are permitted to operate without the full sensor package that a powered door needs — but only if the speeds and forces stay within the limits. That is the catch: a low-energy door that has been sped up, or whose closing force has drifted, is no longer a low-energy door and is no longer compliant.

Full-power sliding and swing doors

Main entrances on retail, medical and office buildings. These open fast, which means they rely on sensors to know when someone is in the way. Here the sensor package is the safety system, not a convenience feature, and a failed sensor is a failed door.

Sensor zones: the part that quietly stops working

Automatic doors use two different kinds of detection and people routinely confuse them.

Activation sensors see someone approaching and tell the door to open. Usually motion-based, mounted above the door, aimed outward at the approach.

Presence (safety) sensors see someone standing in the doorway or in the path of the moving panel and stop the door from closing on them. These are the ones that matter for safety, and these are the ones that fail silently — because when a presence sensor stops working, the door still opens and closes normally. Nothing looks wrong. It just no longer protects anyone.

The common failure modes, in rough order of how often they turn up:

• Drifted aim. Someone bumps the header unit with a ladder or a delivery cart, the sensor rotates a few degrees, and the detection zone no longer covers the doorway. Classic result: the door closes on someone standing just inside the threshold.
• Dirty or fogged lenses. Dust, grease near food service, hard-water spray from sidewalk cleaning, or condensation inside the housing.
• Floor changes nobody connected to the door. New dark matting, a glossy refinished floor or a reflective entrance tile can change how the sensor reads the ground and shrink the zone.
• Sunlight and seasonal angle. A low winter sun straight into a sensor can blind it at a particular hour of the day. This is the one that produces the maddening “it only does it in the afternoon” complaint.
• Sensors disabled on purpose. A sensor that nuisance-trips gets turned down or unplugged by whoever was closest, and then stays that way. This is the finding that gets a door shut down.

What the annual safety inspection actually checks

The inspection is a measured test, not a visual once-over. The inspector works through the door the way a user would and the way a hazard would.

Forces and speeds

Closing force is measured with a gauge, not judged by feel. Opening and closing times are timed. On a low-energy door these have defined limits and an operator that has been adjusted up over the years frequently lands outside them.

Detection zone verification

The inspector walks the zone and stands in it — at the centre, at both jambs, and at the pivot side of a swing door where the pinch hazard is. A presence sensor that works in the middle of the opening and not at the jamb is a fail.

Hold-open time

The door must stay open long enough for someone slow-moving to clear the opening. Hold-open time that has been shortened to cut heating loss is a common and well-meant mistake.

Signage and markings

Required decals on and around the door, correct for the door type and facing the right way. Missing or wrong-facing signage is one of the easiest things to fail on and one of the cheapest to fix.

Guide rails and pinch points on swing doors

Powered swing doors need the approach managed so people are not walking into the arc of the panel. Guide rails get removed during renovations and never go back.

Emergency and breakout function

Doors on an egress path have to open under manual force when power is lost. On sliders that is the breakout function, and it has to actually break out — not bind on a track that has filled with grit.

Mechanical condition

Rollers, carriers, belts, the bottom guide on a slider, and the arm and spindle on a swing operator. Mechanical wear shows up as a door that hesitates, shudders or drifts, and it eventually becomes a safety issue because the operator starts fighting the mechanism. This is the point where inspection becomes repair, and where automatic door repair is the right next step rather than another adjustment.

The manual-closer problem that catches people out

Many buildings run a mix: an automatic main entrance and manual doors on the vestibule, stairwells and back of house. Those manual doors are not under the automatic door standard, but they are under fire and accessibility requirements, and the closer is what decides whether they comply.

A closer adjusted too tight fails an accessible opening-force check. A closer adjusted too loose will not latch a fire door, and a fire door that does not latch is a far more serious finding than a slow automatic door. Both of those are the same adjustment screws, which is why commercial door closer repair tends to come up in the same visit as the automatic door inspection — the inspector is already walking every door in the building.

When the operator should be replaced instead of adjusted

Adjustment has limits. A few patterns mean the operator has reached the end rather than needing another tweak:

• The door only holds its settings for a few weeks before drifting back.
• Control board faults that clear on a power cycle and return.
• Parts availability — an operator whose control board or sensor module is no longer made cannot be kept compliant indefinitely.
• The opening has changed. A doorway that now sees far more traffic, or a wider leaf after a renovation, may be beyond what the original operator was sized for.

Replacing an operator is also the moment to get the opening right rather than inheriting the old compromise — header condition, floor level at the threshold, and whether the approach actually suits a slider or a swing. That is a commercial door installation conversation, and doing it at replacement time costs far less than revisiting it later.

A short list for facility managers

• Know the date of your last inspection and keep the report where you can find it.
• Wipe sensor lenses as part of routine cleaning — it prevents a surprising share of callbacks.
• Never let anyone disable a presence sensor to stop nuisance tripping. Get the cause fixed.
• Re-check the door after any floor, mat, lighting or entrance renovation.
• Treat “it only happens sometimes” as a real fault, not a quirk. Intermittent is how sensor problems present.
• Log every incident involving the door, even a near miss.

Frequently asked questions

How often does an automatic door need a safety inspection?

Annually is the accepted baseline, and more often for high-traffic or healthcare entrances. Many insurers and property managers ask for the record, so keep the report.

Who is allowed to perform the inspection?

It should be done by a technician trained and certified on automatic pedestrian doors, using calibrated force-measuring equipment. A general handyman check is not an inspection.

My automatic door works fine. Do I still need it inspected?

Yes, and this is the most important point here. A door with a dead presence sensor opens and closes perfectly. The failure is invisible until it injures someone.

Why does our door open by itself at night?

Usually an activation sensor reading something that moves — a flag, blowing snow, a hanging sign, or headlights across the approach. Re-aiming or masking the zone normally solves it. Turning the sensor off does not.

Can a low-energy door be sped up?

Not beyond the standard’s limits. If it is too slow for the traffic it carries, the right answer is a full-power operator with the proper sensor package, not a faster low-energy unit.

Is the automatic door on our fire exit route a problem?

Only if it cannot be opened manually when power is lost. The breakout or manual-opening function has to work, and it is one of the first things an inspector tests.