Nuisance alarms are stressful. They wake the house, spook the dog, and make you question the setup. The good news is that most repeat trips have simple causes that you can check in minutes.
Thankfully, Ajax alarm systems are some of the most reliable, robust and professional systems on the market and rarely go wrong or trigger on false alarms. This guide walks you through the quickest fixes for the most common Ajax alarm triggers in Brisbane and the Gold Coast. We will also show how MotionCam photo verification helps you confirm real events, and when it is worth booking a fixed-price service call.
Start here: safe, simple checks you can do now
Before changing any settings, disarm the system, open the Ajax app, and review the notifications for the last trip. Note the sensor name, time, and whether a photo was captured. Then work through these fast checks in the room or area that triggered.
Pets and mounting height.
Pet-immune Ajax motion sensors are designed to ignore pets up to 20 kg when mounted at the correct height and angle. If a sensor is too low, aimed at stairs or furniture that pets climb, or pointed at a cat tree, it can see a small animal as a person. Raise the sensor to the recommended height, keep it level, and avoid aiming over benches or stair risers.
Drafts and moving air.
Air conditioning outlets, ceiling fans, and gaps under doors can move curtains, indoor plants, balloons, or light decorations in the field of view. Secure or remove the moving item, or adjust the PIR view so it looks across the room rather than directly at airflow.
Sun, glare, and heat sources.
Direct sun, reflections from glossy floors, or a heater in view can cause thermal shifts that look like motion. Tilt the sensor slightly down, avoid aiming at windows, and use supplied blinds or masks where relevant.
Sensor masking and dirt.
Outdoor and indoor sensors can false trip if the lens is partially covered by tape, paint overspray, spider webs, or dust. Gently clean the lens with a soft microfiber cloth. Do not use solvents.
Correct zone type.
In the Ajax app, check the device room and zone type. An interior sensor set as perimeter or always-active will trigger when you walk past during the day. Interior Follow or Night mode may be more appropriate.
Low batteries and tampers.
Ajax alerts you when batteries are low, but borderline cells can behave erratically in cold snaps or heat waves. Replace the battery if the app shows low status. Also confirm the sensor is firmly mounted and the tamper switch is depressed.
Radio interference.
Jeweller wireless is robust and encrypted, but heavy metal shelving, new appliances, or a full-length mirror close to the sensor can reduce signal quality. Reposition the sensor a few centimetres or rotate it to improve signal. In the app, check Jeweller signal strength and noise level.
Entry and exit delays.
If the siren sounds when you come home, the delay might be too short for your usual path or door. Extend the entry delay a little, or arm in Night mode if that suits your routine.
If your alarm trips again after these steps, review the app event log and photos. MotionCam snapshots will help you decide if it was a person, a pet, or movement like a curtain. If you are unsure how to interpret the photos or settings, call us and we will talk you through it.
How MotionCam photo verification saves time
MotionCam sends a rapid burst of images to your phone, typically under 9 seconds from alarm. It shows what triggered the event without you needing to check every room. This makes it easy to rule out pets, see moving curtains or balloons, or confirm an actual intruder so you can act quickly. For outdoor protection, MotionCam Outdoor and DualCurtain Outdoor provide long, narrow detection with anti-masking to keep fence lines and driveways covered while filtering rain, insects, and heat shimmer.
If you do not have MotionCam on the sensor that keeps tripping, we can swap that device or add a camera-enabled detector in the same location.
Fine-tuning that Mr Secured can do for you
Our technicians are certified Ajax installers and can dial in your system so it fits your home and routine. Typical improvements include:
Sensitivity and pet-immunity profiles. Matching sensor height, angle, and sensitivity to your pet size, ceiling height, and room layout.
Entry and exit timing. Adjusting delays and arming paths so you do not race the timer.
Perimeter versus interior zoning. Setting fences, sheds, and windows as perimeter so they protect first, while interior sensors arm in Night mode or Away only.
Active deterrence. Linking sirens and lights to specific perimeter events to stop intruders early, while keeping interior alerts discreet at night.
We can also integrate your Ajax alarms with CCTV so camera recording is triggered on alarm and you get clearer evidence. If you are considering camera coverage or upgrades, explore our Brisbane-focused guidance on selecting the right system in our page on home security cameras in Brisbane, then ask for a combined quote that ties the two systems together.
When a site visit helps
Some issues are environmental and best solved on-site. Book a visit if you notice:
Repeated trips from the same sensor after you have checked height, airflow, and masking
Very low Jeweller signal or rising noise levels in the app
Confusion around zone types or arm modes across multiple users
MotionCam photos that suggest a blind spot or a reflection you cannot eliminate
Most residential service calls in Brisbane and the Gold Coast are scheduled promptly, with typical on-site turnaround within a few business days subject to booking windows. We use fixed pricing for service visits, explain the likely cause, reposition or replace hardware if required, and re-walk you through the app so you leave confident.
Security concerns and Ajax reliability
Ajax is an EN 50131 Grade 2 wireless platform with encrypted communication, anti-jamming, and tamper detection. Like any system, poor placement or the wrong zone type can create nuisance alerts. Security issues we see are usually configuration related, not platform failures. Correct mounting height, sensible sensitivity, and proper perimeter-interior separation address the majority of problems. For compliance areas like fire detection, we also supply interconnected solutions across Brisbane. If you need help with smoke alarms, see our page on Brisbane smoke alarm installation for options that reduce false alerts from steam and cooking.
DIY or professional install?
Ajax is designed for professional installation. You can technically self-install, but we do not recommend it because mounting height, angle, and zone logic are critical for pet immunity and false-alarm reduction. Professional commissioning includes signal surveying, anti-masking checks, user training, and app setup. The difference shows up on day one in fewer trips and clearer response flows. If you prefer a done-for-you approach with one installer and one warranty, we handle supply, setup, and long-term support across South-East Queensland.
Quick FAQ
Why does my Ajax alarm keep going off? The most common causes are pets in view, drafts moving items, incorrect mounting height, sensor masking, low batteries, radio interference, or a zone set to the wrong mode. Start with those checks, then review MotionCam photos.
What should I do if an alarm is constantly going off?
Disarm, check the app event log and photos, adjust the affected sensor’s height and angle, remove moving items in view, clean the lens, and confirm zone type. If it persists, call us for a calibrated sensitivity and zoning review.
What are the security issues with Ajax? When installed and configured correctly, Ajax is reliable, encrypted, and anti-jamming. Issues typically stem from placement or configuration rather than platform security.
Can I install an Ajax alarm myself? You can, but professional installation is recommended to ensure pet immunity, signal quality, correct zoning, and fewer false alarms.
Need help now?
Call Mr Secured on 0490 130 339 or 1800 187 747 for friendly phone support. If an on-site visit is best, we will book a fixed-price service call in Brisbane, Ipswich, or the Gold Coast and get your system tuned properly. If you are planning to add cameras or prefer a combined quote, our team can advise on the right CCTV options for your property and budget, including guidance from our CCTV installers in Brisbane. For compliant, interconnected fire detection with fewer nuisance trips, review our smoke alarm installation options for Brisbane and the Gold Coast.
Ready to stop nuisance alarms and restore peace of mind? Contact Mr Secured today for a free assessment and clear, fixed pricing.
