Just ask if its their policy to lock or not

They may refuse any information of course ..... The new owner isn't their customer, and would only become their customer if he decides to use their services. Any contract they had was with the previous occupiers.

figured they'd be pretty tight with the information, guess i could ask the neighbours if they know the code

Re programming it shouldn't be too difficult, i've done more complicated ones. Obviously i can't do a factory reset as i need the engineers code but would killing the power for a while make it forget? Seems a bt extreem! Might just call them next week and see what they have to say

all.

no killing the power wont clear it who is the alarm company

figured they'd be pretty tight with the information, guess i could ask the neighbours if they know the code

Re programming it shouldn't be too difficult, i've done more complicated ones. Obviously i can't do a factory reset as i need the engineers code but would killing the power for a while make it forget? Seems a bt extreem! Might just call them next week and see what they have to say

all.

I would suggest that the engineer code would be locked, and is programed so for exactly this reason, client getting hold of a engineer manual, and any alterations to system in the future cannot be done by anyone but the install company. Which would be chargeable, and make good business sense.

What i suggest is crash the system if it does not unlock the eng code, go down to your local electrical suppliers and buy another one and just change the PCB over.