Automatic Door Troubleshooting: Common Faults and Fixes

This automatic door troubleshooting guide works through the faults we attend most often, and what each symptom usually points to.

When a powered entrance plays up, a clear automatic door troubleshooting routine helps you spot the cause fast – and know what you can check yourself versus what needs a technician. This 2026 automatic door troubleshooting guide walks through the most common faults, their likely causes and safe first checks, plus when to call Coetz for a repair.

Safety first: never disable a safety sensor to make a door work, and keep clear of a door that is behaving unpredictably. Powered doors move heavy glass – if in doubt, switch it to manual or off and call a technician.

The door will not open: automatic door troubleshooting

Start your automatic door troubleshooting here:

• No power – check the isolator, plug and circuit breaker.
• Activation sensor blocked, dirty or misaligned – clean the lens and clear the detection zone.
• Door switched to manual or night-lock mode – check the mode switch.
• Operator or controller fault – this needs a technician.

The door will not close (or closes too slowly): automatic door troubleshooting guide

Common causes to check:

• Something in the safety-sensor beam holding it open – clear the opening.
• A dirty or faulty presence sensor – wipe the lens; if it persists, call a technician.
• Hold-open time set too long, or a controller setting drifted.
• Worn drive belt or motor if it closes slowly or unevenly.

Strange noises or juddering: automatic door troubleshooting

Grinding, scraping or banging usually points to the mechanism:

• Dust or grit in the track – clean it out.
• Worn or dry rollers, or a slipping drive belt.
• A loose fixing, bracket or end stop.
• See how the sliding door mechanism fits together to understand the cause.

Sensor problems: automatic door troubleshooting guide

If the door misses people or triggers on its own, the sensors need attention – clean the lenses, clear reflective surfaces and moving signage from the detection zone, and if it continues, have the sensors recalibrated. Sensors set up to recognised automatic door technology safety principles should detect reliably every time.

What you can fix vs what needs a technician: automatic door troubleshooting guide

Safe first checks – power, clean sensors, clear the opening, check the mode switch – are fine for your team. Anything involving the operator, belt, rollers, controller settings or safety recalibration needs a qualified technician, both for safety and to keep the door compliant. Book repairs promptly and keep a maintenance checklist running to prevent faults.

Why choose Coetz

Coetz repairs and services most makes of automatic door as one accountable team – diagnosing the fault, fitting genuine spare parts and resetting the door to safe operation. Explore our full automatic doors range and maintenance plans.

Coetz has years of experience with automatic entrances across South Africa, from single shopfronts to multi-door developments. We match the operator, sensors and glass to your traffic and building, install to standard, and back every entrance with service and genuine spare parts – so the door keeps working long after the invoice is paid.

Fast repairs across South Africa: automatic door troubleshooting guide

As a Gauteng-based team we repair and service across the region and support nationwide. When your automatic door troubleshooting points to a fault you cannot safely fix, Coetz responds fast – prioritising failed or unsafe doors to get you trading again.

Get a repair or quote: automatic door troubleshooting guide

Door not behaving? Tell us the symptoms and we will diagnose the fault, quote the repair and get your entrance safe and reliable again – with fast local response.

Tips to avoid faults: automatic door troubleshooting guide

Keep sensor lenses and the track clean, report unusual noises early, and set a regular service interval rather than waiting for a breakdown. Add battery backup for load-shedding and never bypass a safety sensor. Because Coetz is Gauteng-based, we respond fast for both repairs and service.

What is the first step in automatic door troubleshooting?

Start automatic door troubleshooting by checking the power, cleaning the sensor lenses, clearing the opening and confirming the door is not in manual or night-lock mode.

Why is my automatic door not closing?

Usually something in the safety-sensor beam, a dirty presence sensor, a hold-open setting or a worn belt – clear the opening and clean the sensor; if it persists, call a technician.

Can I fix an automatic door myself?

You can do safe first checks – power, clean sensors, clear the path – but operator, belt, roller and safety recalibration work needs a qualified technician.

Does Coetz offer emergency repairs?

Yes – as a Gauteng-based team Coetz offers fast on-call repairs, prioritising failed or unsafe doors to get you trading again quickly.

Backup power and access control

Battery backup, fail-open or fail-secure behaviour and the manual release are decisions about the building, not the operator, so they belong in the specification for automatic door Troubleshooting guide from the start. The same is true of access control — readers, buttons, intercoms and time clocks all interrupt or enable the operator, and retro-fitting them is mostly cable and ceiling work.

Matching the system to the traffic

Count the people, not the doors: one cycle is one open-and-close, so a doorway used by hundreds of people a day is doing far more work than the same doorway in a quiet office. That count, the opening width and the glass weight decide which system suits automatic door Troubleshooting guide.

• Single sliding for shops, receptions and clinics.
• Bi-parting for malls, supermarkets and hospital corridors — openings up to 5000 mm.
• Telescopic where the wall beside the opening is short.
• Swing operators to automate an existing hinged door.

Survey and specification for automatic door Troubleshooting guide

A survey for automatic door Troubleshooting guide is short but specific: structural opening width and height, the condition and support of the head, what runs above the ceiling line, the power position, and how people actually approach the doorway. Those notes become the specification, and they are also what makes two quotations comparable instead of guesswork.

How long do automatic doors last?

Life depends on traffic, environment and maintenance rather than age. The MC-125 operator is tested to one million operating cycles, and a serviced entrance comfortably outlives an unserviced one.

Can you automate a door we already have?

In most cases, yes — a swing operator such as the MCW-100 automates an existing hinged door up to 1,200 mm and 150 kg (interdependent).

Comfort, access and energy

A door that opens only when it is needed keeps conditioned air inside and dust and noise out, which is the practical argument for automation beyond convenience. Set the hold-open time for the slowest user rather than the fastest, add presence detection so nobody is caught in the opening, and the entrance works for everybody who uses the building.

Estimating the traffic honestly

One cycle is one open-and-close, so a doorway used by 400 people a day is not doing 400 cycles — it is doing far more once deliveries, staff and trolleys are counted. Estimating that number before ordering is what separates an entrance that lasts from one that needs a call-out every few months, because the operator, the sensors and the service interval are all chosen against it.

What to send us for a quote

A useful quotation needs very little: the structural opening width and height, a photograph of the doorway taken square-on, a note of what is above the opening, and a rough idea of daily traffic. Tell us whether access control or a battery backup is wanted and the quote comes back complete rather than caveated.

• Structural opening width and height in millimetres.
• A square-on photograph of the doorway and what sits above it.
• Rough daily traffic, including deliveries.
• Whether access control, intercom or battery backup is wanted.
• Any deadline the entrance has to meet.

Can access control be added later?

It can, but cabling into a finished ceiling costs more than specifying it with the door. Readers, push buttons, intercoms and time clocks are all straightforward at installation stage.

How quickly can a fault be attended?

Gauteng call-outs are attended within 24 hours, and service runs nationwide. Telling us the symptom when you call means the right spare travels with the technician.

Automatic door troubleshooting guide in short

If you are pricing automatic door troubleshooting guide, send the structural opening sizes and a photograph and we will specify the system, the sensors and the glass against the traffic the doorway really carries. Automatic door troubleshooting guide are supplied, installed and serviced by one team, with spares held locally.

Ask us about automatic door troubleshooting guide and we will confirm the opening, the power supply and the traffic flow before quoting a fixed price.

Automatic door troubleshooting guide at a glance

• Pricing for automatic door troubleshooting guide follows the opening width, the glass and the sensor layout.
• Ask us to confirm the opening before ordering automatic door troubleshooting guide.

Automatic door troubleshooting guide: getting a quote

If this automatic door troubleshooting guide has not solved the problem, MC Automations, our parent company, can repair, service or replace the door. To quote accurately, we need to know:

• The opening. The width and height of the clear opening, with photos of the existing frame or shopfront.
• Sliding or swing. The MC-125 automatic sliding door system is R27 590 and the MCW-100 swing door operator R15 900, excluding VAT.
• Traffic. How many people use the entrance, and whether trolleys, prams or wheelchairs pass through.
• Power. Whether there is a power point near the head of the door.
• Installation. Installation is included in Gauteng; outside Gauteng it is quoted per project.
• Service and warranty. We recommend a service every six months, and the operator carries a 24-month warranty.

Questions about this automatic door troubleshooting guide? Call 010 412 0062, WhatsApp photos to 076 613 4418, or price an automatic door in the online estimator.

Door stuck open? See automatic door not closing. Replacing a motor? See our automatic sliding door motor guide.

Check the mode first: see automatic door operating modes.