Dual tech PIR Faulty?

[FortJefferson]

We keep getting a false alarm from the garage sensor. The system was installed in 1996, and has been trouble free until now. I have cleaned and checked all the connections, but no joy. Do these sensors become "faulty" and should I replace it?

Thanks John.

 

[alan333]

I've had exactly the same, the bottom line is that fitting a new sensor cured mine, but here's the thread if you want a read...

//www.diynot.com/diy/threads/how-to-tell-if-pir-is-faulty.412185/

 

[EightyTwo]

Make sure that the microwave range is not set too high - microwaves will go through windows, walls and doors and detect movement outside. Back it off, wait a minute and walk test the DT.

 

[EricMiles]

I am also having the same problem with false alarms from motion sensors. I have tried relocating them, but still not working.

 

[Europlex]

18yr old detector, replace it, (them).

 

[FortJefferson]

Well I've replaced the sensor with a Pyronix KX10DTP Pet Immune DualTec. And it seems to have cured the problem.

Thanks for all the replies. John.

 

[FortJefferson]

Just an update.

We had another false alarm last week, this time with one of the house sensors, so I have now replaced all the original sensors with new. I got them from Bradgate supplies at Coalville via Ebay.