In article ,
Micky Savage wrote:
Door contacts and panic buttons are a pain in the ass, they are very
simple devices that go faulty very easily, you may have to replace them.

Usually because they get physically damaged through poor installation. A
reed switch has a near infinite life if not abused.

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*Aim Low, Reach Your Goals, Avoid Disappointment *

Dave Plowman London SW
To e-mail, change noise into sound.