In NSW, press the Test button on every smoke alarm at least once a month, vacuum the vents every six months, and replace the whole unit every 10 years. A loud tone while you hold Test means that alarm is alive. If nothing happens — or only some alarms sound in an interconnected set — call a licensed electrician. Never leave an alarm with the battery pulled out.
Dust, insects, a flat backup battery or an expired sensor can leave an alarm looking fine while it is effectively dead. Monthly testing is how you catch that before you need it at 2 am.
NSW law requires working smoke alarms on every level where people sleep. Rentals add landlord duties. Testing does not replace those rules — it proves the gear still works between formal checks. See our NSW smoke alarm rules guide for the legal baseline.
Hardwired 240 V alarms still have a backup battery. If opening the unit means touching wiring, stop and call us.
Every six months, vacuum the vents with a soft brush. Do not spray cleaners or paint the alarm. Note the manufacture or replace-by date — Fire and Rescue NSW advises replacing units every 10 years. End-of-life chirps often continue after a new battery; that is the sensor saying it is finished.
Chirping every 30–60 seconds is covered in detail on our smoke alarm beeping page.
Fixed electrical work in NSW is for licensed trades. Blue Link Electrical Services (licence 332956C) installs and interconnects alarms across Sydney.
Get out and call 000. Do not diagnose a chirp while there is smoke in the house.
0421 772 661Street outage or fallen lines: Ausgrid 13 13 88. We take genuine after-hours electrical emergencies only.
If you rent in NSW, your landlord must keep smoke alarms working and check them at least once a year. That does not stop you pressing Test each month — it is the fastest way to notice a flat battery between formal checks. When you move in, note the replace-by dates and tell the agent in writing if an alarm fails Test or is past 10 years.
Airbnb-style stays and share houses still need working alarms on every level where people sleep. Interconnected alarms are strongly recommended so a fire in one room wakes the whole place. We install and interconnect hardwired and sealed lithium units under NSW licence 332956C when the building needs more than a battery swap.
Keep a simple log on your phone: date tested, which alarms passed, and any chirps you heard overnight. That record helps if a realestate inspection or strata audit asks what you have been doing.
We cover all of Sydney. Natural next reads if you are local:
Press Test at least once a month. Fire and Rescue NSW also recommends cleaning vents every six months and replacing alarms every 10 years.
Try a new removable battery first. If it still fails, or it is hardwired, call a licensed electrician. Do not leave the alarm disabled.
Yes. Test from more than one unit so you know the network wakes the others.
Landlords must keep alarms working and check them each year. Monthly testing is still smart for anyone living there.
Blue Link Electrical Services · NSW licence 332956C · since 2016 · fully insured
After-hours for genuine emergencies only. Level 1 and 2 supply work arranged through accredited partners.