Tamper so it is a DS12A Door Window Sensor.
Is it one of the ones with an external magnetic switch we where talking about?
Relocated physically or you tried a few different Zone Numbers in the SC1200A?
Did you register the DS12A with the top off?
Make sure the top cover is on tightly as it holds the tamper switch in the normal position.
If this is the only DS12A you have that is tampering out. You could be correct and it is defective.
Yes Brian, it is 12A. I just ordered the external switches, the answer to question #2 is no. I did not try another number for that sensor and am sure I registered correctly and the lid was fine. I just replaced the zone with a new one. I'll give it another go with a new zone number later today.
While you are around I have another question. If we are away (like 500+ miles away) and there is an alarm, but none of my neighbors (who I intend to give remotes to) are home, will the console alarm indefinitely? Can that damage it? As I posted under Security>General, I'm not able to access the console during an alarm to disarm, if indeed I'm doing it properly. No problem accessing it when not alarmed. Thank you!