[Al Skierkiewicz]

Lonnie,
I am a little surprised at the noise problems you are having. If you use the normally closed contacts, then the line impedance is so low (effectively zero ohms) that noise would only affect the input circuitry if a motor was directly connected to the switch. Even when using the normally open contacts there is still a low enough impedance by the DSC input to be relatively immune to noise pickup. What you may have is an intermittent switch contact that is affected with vibration. The result would be a rapidly changing trigger to the DSC. This should be easily diagnosed by rapping the switch with the insulated end (handle) of a screwdriver. Microswitches can be damaged by rough handling of the exterior contacts. In rare cases, the internal spring can be damaged or broken resulting in the effect you describe.