Changing alarm master and user codes can be performed easily in most cases. Please refer to your user manual for Instructions on how to change codes.
If you have lost your master code this must be done by a licensed technician as you will need to factory default your alarm system. You cannot do this procedure without an installers pin code.
Please never give your code to anyone. If you think someone may have your user pin code, please change this immediately If you move into a new property with an existing alarm system please have it serviced immediately and ask the service technician to check and clear remote control disable program locations . Pre owners may have a remote control arm/disarm that you may not be aware about