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?
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