What brand of panel is it , some can be unlocked , some cannot.
If your system is monitored , then they have some justification to ensure the programming is not altered by the enduser.You may have some small print to this effect.They should offer to change the code for a callout fee.
The panel is a DSC. I have only the user manual (no fitting instructions)
Manual:
DSC
CLASSIC
PC1565.
LCD5500Z KEYPAD
Software version 2.5U.
We don't have it monitored. Though the installer wired the fone to it in case we did want to have monitored.
He has stated he will change the box back to default for 49.50 + vat
He has also offered to give a free service and fit new batterty. (After I confronted the perputrator of the faling out. His son).
Tbh. with the conversation we had I don't want this person on my property again. And would probably rip out the unit rather than have a cuckoo type arrangement where even other alarm companies are locked out.
I suppose somewhere in small print there is reference saying only they are alowed in my box
but i can't find it..
Thanks .. John