On Friday, January 9, 2015 at 11:25:11 AM UTC, Dave Plowman (News) wrote:
In article ,
wrote:

I'd avoid reed switches. They're very fussy and tend to fail when used
like this. Also when used as door closed detectors, gusts of wind,
warping etc result in false alarms too.

I've got reed switches on every window and external door. Fitted years
ago. Not ever had a problem. Sound like they weren't correctly installed.

There are known issues with reed switches. They're no longer used in burglar alarms - they once were - because as well as being electrically issueful there were so many door alignment false alarms. Yours may be fine, but so many were not.


NT