Hi there. I have a house with a 9427 alarm system. I've had the house many years and the alarm used to work fine and I see that all the PIRs still work.

I rented the house out for a few years and have returned to it and would like to use the alarm again. I can't recall the original alarm number and can't get a hold of it.

How can I reset the system and install a new number?

David, December 2013

Big yellow book.
Familiar with it?.

Find a NSI/NACOSS GOLD registered installer/company local to your area and book a service visit.

e manno, December 2013