We may have found other answers which could help you.
Click here for Security System Home
Stuck button on gardtec 500?
Gardtec cpx lost chime yet again?
Gardtec 800 system error code -t after power cut?
How do I take Gardtec 580 keypad off wall?
Gardtec 800 with a battery/fuse failure?
how can I disable a Gardtec series 300 alarm?