Many thanks guys! Came back from holiday two weeks ago and due to being tired i forgot about the alarm and by the time i had remembered my code it was to late. After encountering an ongoing problem with the alarm a few months ago, the egineer gave me the code to reset the alarm if it went off. Put the code in, but he forgot to tell me how you get out of installer mode. Did 99 like you suggested and it worked!
Many thanks for saving me money, by not having to call out an egineer.
Rob
October 2009