House Alarm Help - Securit 700L

Hi,

I have been having a problem recently whereby my alarm will not always recognise the front door is closed when i set it and leave the house and when it does register (the tone changes) the sounds stop but shortly afterwards the alarm sounds

I have tried the reset (code + hash) to no avail so wondered if anyone else had any suggestions I can try?

Thanks

Matt

You've probably have this sorted by now, but it's a faulty sensor, bad connections or broken wires.