Every now and then, the light on my keypad blinks. Just once. no door, window, or other sensor has triggered it, as far as I know.
I only know this happens because the panel in my bedroom is within my field of view when I'm watching TV, so it's possible that all my keypads exhibit this, but I've never stood in front of the pad in the kitchen, for example, to stare for 20 minutes on the off chance it blinks.
Anyway, does anyone have any idea why this might happen? I've only noticed it when the LED is green (unarmed), though I suppose it might happen when armed, too.... No biggie, it's just something that drives me nuts. :)
I have a Vista-20P (I think), and the regular LCD keypad (not the alphanumeric).