What causes false activations of smoke alarms- The last sentence is really important

If hardwired interconnected photoelectric smoke alarms are activating and there is no identifiable cause for the activation (eg. dust), the issue could be related to either the power supply or incorrect installation. Hardwired smoke alarms refer to devices which are connected to the household 240 volt supply.

(There are a number of reasons for false activations originating from battery operated alarms such has maintenance i.e. dirt trapped in the alarm, age of the device or a faulty device.)

In some regional or remote areas in Queensland, fluctuations in the power supply travelling to your house or from electrical/electronic equipment in your home may cause false activations of hardwired smoke alarms. This is also known as ‘dirty power’ and solar energy may also cause these fluctuations in power supply. To overcome this problem, a filter can be installed on the switchboard to reduce the impact of these fluctuations in power supply.

Incorrect installation of smoke alarms can also cause false activations of hardwired interconnected photoelectric smoke alarms. Manufacturers have specific instructions which must be followed when installing interconnected photoelectric smoke alarms. Smoke alarms should not be connected to lighting circuits with dimmers as this will cause false activations.

To reduce the instance of false activations, homeowners should discuss the installation of hardwired (240v) smoke alarms with a licensed electrician who can provide advice and solutions.