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This worked, alarm now working fine again. Thank you so much!

Got the engineer code. Is it just menu 56, 1 (Telecoms) 10 (Line Test Fail) I need to change? Didn't know if there was a knock on effect of changing this or if there were any other menu options I need to address. Thanks

We have the above alarm. Originally installed by ADT a decade ago, it used to text us when it went off but that feature hasn't worked since we cancelled our monitoring contract and had some dodgy alarm men come and reset the whole box (ADT didn't give us the engineers code when we left and...