Automatic Door Sensors: Types, Problems & How to Keep Them Working Smoothly

Automatic doors are an essential part of modern commercial and industrial buildings, offering convenience, accessibility, and energy efficiency. But at the heart of their smooth performance are the sensors that detect movement and control when doors open or close. When these sensors fail or become misaligned, your automatic doors can behave unpredictably — or even stop working altogether.

At UK Doors & Shutters, we specialise in servicing and maintaining automatic door systems for clients across Bolton, Manchester, Liverpool, Leeds, Bradford, Blackpool, and the wider North West of England. Understanding how your sensors work — and recognising early signs of trouble — can help prevent downtime and costly repairs.

Types of Automatic Door Sensors

Modern automatic doors rely on a combination of sensor technologies to ensure safe and reliable operation. Here are the most common types used in commercial and industrial environments:

1. Motion Sensors

These sensors detect movement within a specific range, triggering the door to open when someone approaches. Motion sensors can be based on radar or microwave technology, allowing quick detection from a distance.

2. Infrared Sensors

Infrared (IR) sensors detect heat or body temperature changes near the doorway. They’re often used in hospitals, offices, and retail stores for smooth, contactless operation.

3. Safety Beam Sensors

Also known as photoelectric beams, these sensors project an invisible light beam across the doorway. If the beam is broken (for example, by a person or object), the door will stop or reverse to prevent accidents.

4. Pressure or Floor Sensors

Installed beneath the flooring near entrances, pressure sensors detect weight changes when someone steps on the mat. Though less common today, they’re still used in certain commercial settings.

5. Combination Sensors

Many automatic door systems now use a combination of motion and safety sensors to improve reliability and safety compliance with BS EN 16005 standards.

Common Sensor Problems

Even the most advanced sensor systems can develop issues over time due to environmental conditions, heavy usage, or lack of maintenance. Common problems include:

• Misalignment: If safety beams or motion sensors are slightly off-angle, they may not detect movement correctly, leading to doors not opening or closing at the right time.

• Dirt and Dust: Dust, insects, or debris on the sensor lens can block signals, causing false triggers or unresponsive doors.

• Moisture or Condensation: In humid environments, moisture can interfere with infrared or photoelectric sensors, resulting in malfunction.

• Wiring or Power Issues: Damaged cables or unstable power supplies can cause sensors to flicker or fail entirely.

• False Triggers: Sunlight glare, reflective clothing, or shiny surfaces can confuse sensors, making doors open unnecessarily.

How to Keep Your Automatic Door Sensors Working Smoothly

Proper care and maintenance can significantly extend the lifespan of your sensors and ensure consistent performance:

1. Regular Cleaning: Gently wipe sensor lenses with a soft, dry cloth to remove dirt and dust. Avoid abrasive cleaners that could scratch the surface.
2. Check for Obstructions: Keep the area around your door clear of trolleys, bins, or signage that might block sensor fields.
3. Monitor Door Behaviour: If doors begin to open or close erratically, it’s a sign that a sensor needs adjustment or calibration.
4. Schedule Routine Servicing: Professional servicing ensures all sensors, control units, and safety devices are tested and aligned to manufacturer specifications.
5. Upgrade When Necessary: Outdated sensors may not meet modern safety standards or energy efficiency requirements — an upgrade could improve both performance and compliance.

Upgrading Your Automatic Door System: When Servicing Isn’t Enough

Sometimes, even with regular servicing, an automatic door system may struggle to perform efficiently. That’s when an upgrade becomes a smarter, longer-term solution.

Here are key signs that it’s time to consider replacing or upgrading your automatic door system:

1. Outdated or Obsolete Components

Older door systems may use parts that are no longer available or supported by manufacturers. Obsolete sensors or controllers make future repairs difficult and less cost-effective.

2. Repeated Failures

If you find yourself scheduling repairs more frequently, the underlying problem may be age-related wear rather than isolated faults. In such cases, upgrading to a modern system reduces downtime and improves safety.

3. Inconsistent Door Operation

Doors that open too slowly, close too quickly, or respond unpredictably may be running on outdated logic boards or worn motors. A modern replacement system provides more reliable motion control and smoother operation.

4. New Safety Standards

Safety regulations for automatic doors evolve over time. If your system hasn’t been updated in several years, it may no longer comply with current UK standards (BS EN 16005). Upgrading ensures your premises remain compliant and safe for users.

5. Increased Energy Efficiency

Modern automatic door systems use intelligent sensors and efficient motors to reduce heat loss and energy consumption — helping you lower operational costs while improving building sustainability.

Your Local Experts for Automatic Door Repairs and Upgrades

Whether your automatic door needs a simple sensor realignment or a full system upgrade, UK Doors & Shutters is your trusted partner. Our engineers are fully trained and experienced in working with all major automatic door brands and sensor systems.

We provide Automatic Door installation, repair, replacement, and maintenance services for commercial and industrial clients throughout Bolton and the North West of England.

Book Your Service Today

For immediate assistance, call us at 01204 918991, orbook a free site survey or repair service online.

From faulty sensors to full automatic door upgrades, UK Doors & Shutters ensures your doors stay safe, compliant, and reliable — keeping your business moving smoothly every day.

UK Doors and Shutters: Expert repairs & installations for domestic & industrial roller shutters & doors. Visit ukdoorsandshutters.co.uk or call 01204 918 991 for a free quote.