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Door Alarm Reed Sensor - Identification Please - Confused

Wzwzrd
in Intruder Alarms

Featured Replies

Hi All

We have an old ADT Accord XPC home alarm system that's been excellent.

Recently we've had the alarm go off around half an house after leaving the house, then it resets itself.

I've done some tests and have come to the conclusion that the problem is with our front door Reed Switch sensor.

My issue is tyring to identify the door sensor I need to order - as you can see by the photos, I've taken it apart and mine has two additional resistors.

Every one I've ordered so far doesn't have these resistors and wont work with my alarm system.

Any help in identifying this door sensor and the replacement I need would be much appreciated.

Thanks

IMG_20250107_224825.jpg

IMG_20260523_110857.jpg

IMG_20260523_121405.jpg

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