Non stop trouble beeping every 30 on my simon 3 security system

Two separate problems: Sensor failure and phone communication failure. Most likely, you've not been hooked up to a phone for a while but the system didn't know until it tried to transmit to the monitoring center that you removed a cover on a sensor.

I can tell you how to turn off the panel beeps, "beeps" not only includes the trouble beeps that are driving you crazy, but also the beeps letting you know it's counting down, either when you've just armed it or when you come home right before the alarm sounds.

Open the cover and enter your code using the red numbered buttons inside there. It doesn't beep when you press buttons, so press them well. When you've done it right, it will tell you to choose from the Start Menu. Choose "DELETE". Then, from the Main Menu, choose "OPTION #". Then press DONE. You have now turned off beeps. You haven't fixed anything and that sensor still isn't working but it's not beeping to get your attention now. Press SYSTEM STATUS two times to hear it tell you what's going on.

To turn beeps on again, open cover, enter code and choose ADD > OPTION # > DONE.

YOu might want to check the voltage rating on the battery. Radio Shack can meter the battery for you to let you know if the battery you purchased is actually up to specs. It's rare, but some batteries are not fresh and it's possible you have tried a non fresh battery as the replacement. THe sensor generally has a safety feature that puts it into a beeping mode once the supply battery drops below a specific voltage. It doesn't take much of a drop and that's really a good thing.

BIll Aggie