Why Is My Automatic Shop Door Stuck Open?

An automatic shop door stuck wide open isn't just an inconvenience — it's a direct security risk, a massive hit to your heating or air conditioning bill, and an open invitation for bad weather to ruin your entryway. Before you panic or start forcing the mechanism, there are a few safe, basic checks you can run yourself. In many cases, the fix is simple. If it goes beyond that, knowing when to stop and call a professional is what keeps your premises safe, compliant, and insured.

Step 1: Clear the Floor and Bottom Tracks

Automatic sliding and swing doors rely on a clear pathway to move freely. Even small pieces of debris can trigger the safety system and hold the door open to prevent damage or injury.

• Check the threshold. Look closely at the bottom floor track or guide channel. Gravel, small stones, litter or accumulated dirt can block the roller guide.
• The fix. Gently sweep out the track and clear any visible blockages. Never force the door leaf along the track manually if you feel resistance.

Step 2: Clean and Inspect the Safety Sensors

Most modern automatic doors use infrared or radar sensors mounted above the door or on the frame. If a sensor "thinks" an object is standing in the doorway, it will hold the door open indefinitely — and it's doing exactly what it's designed to do.

• Check for obstruction. Look for hanging signs, seasonal decorations or tall display items near the entrance that might be swaying into the sensor's field of view.
• Wipe down the lenses. Dust, grime or a heavy cobweb on the sensor lens can scatter the signal. Safely wipe the glass or plastic cover with a soft, dry microfibre cloth.

Step 3: Verify the Key Switch / Control Position

It sounds obvious, but automatic doors are frequently switched to "Hold Open" or "Exit Only" by staff during deliveries or shift changes — and then never switched back.

• Locate your wall-mounted program switch or digital selector.
• Ensure the system is set to "Auto" or "Two-Way Traffic" rather than "Hold Open" or "Off".
• If you have a remote control fob, check that a button hasn't been accidentally pressed or jammed inside a drawer.

Step 4: Perform a Controlled Power Reset

Sometimes the internal logic board simply needs a reboot to clear a minor system glitch.

• Turn off the main power switch to the door system (usually a switched fused spur near the door header).
• Wait 30 to 60 seconds to allow the control board capacitors to fully discharge.
• Turn the power back on and observe the door. Most systems will perform a slow "setup" cycle to recalibrate their end positions.

Why These Rules Exist: BS EN 16005

Every one of these checks stays on the safe side of a much stricter rule: in the UK, power-operated pedestrian doors are governed by BS EN 16005, the safety standard covering sensors, force limits and safe operation. It's the same standard behind every automatic door repair and installation we carry out. This short explainer from sensor manufacturer BEA covers what the standard actually requires and why it exists:

Video: "EN 16005 Safety Requirements for Automatic Sliding Doors" — BEA Sensors.

When to Call an Emergency Door Engineer

If you've cleared the tracks, wiped the sensors, checked the switches, and reset the power — but the door remains wide open — you're likely facing a hardware failure: a snapped belt, a motor fault, or an internal circuit board error.

Need Urgent Help? We're Available 24/7

Don't leave your shop floor exposed overnight or risk customer safety. If your automatic door won't close and basic troubleshooting hasn't resolved it, our automatic door repair team of ADIA-certified engineers is on standby around the clock. We carry extensive spare parts on our service vehicles to get your entrance secure and fully operational on the first visit — see our 24/7 emergency callout page for how it works, or read our full guide on what to do when your doors fail. Running a retail unit specifically? Our shop front & business door repairs service is built around keeping you trading with minimal disruption.

Common Questions

Stuck-Open Door FAQs

Why has my automatic shop door stopped closing?

The most common causes are debris in the floor track, a dirty or obstructed safety sensor, the control switch being set to "Hold Open", or a minor system glitch that a power reset can clear. If none of these fix it, the door likely has a hardware fault and needs a qualified engineer.

Can I fix a stuck automatic shop door myself?

You can safely clear visible debris from the floor track, wipe the sensor lenses, check the program switch, and perform a power reset. You should not force the door leaf, bypass safety sensors, or open the motor or control board yourself — that's a job for a certified engineer under BS EN 16005.

What triggers an automatic door's safety sensor to hold it open?

The sensor holds the door open whenever it detects something in the doorway. That's usually a genuine person or object, but hanging signs, seasonal displays or a dusty sensor lens can trigger it too.

Is it against regulations to repair an automatic door myself?

Basic housekeeping is fine, but under BS EN 16005, mechanical and electrical repairs must be carried out by a qualified engineer. Tampering with the motor, wiring or safety sensors yourself can invalidate your business insurance.