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what is a code 66?

i have a gardetec 300/500 series. just moved in and the alarm panel says 66 on screen. power light is on panel and sesors are working. the alarm box shows red lights flashing.
paul, July 2007
I think maybe what you are seeing on the screen is "b b" and not 66 b b means, bell box tamper.

Pete, July 2007
link Click here to see other fixes for GardTec 300/500.