Hoople, I can relate, I really wanted mine to chirp too.How I understand it is,,, the unit without the antenna does not chirp. I may be wrong and don't understand it but see Joy's link. It seems to indicate you need the antenna model (?)
Man, you must really want that "Chirp"
For that code 31 to come back again, sure does not look good. I would have guessed the new siren would have gotten you straightened out. Your "paying you dues" on this one for sure.
he said 02 models were trouble