Y Reg VW Passat Alarm. - andy1988
Can anyone tell me why my alarm keeps on going off when set,

{Shouting, ie solely upper case text amended. DD}
Y Reg VW Passat Alarm. - DP
Have you had / do you have any water leaks into the car when it rains?

Cheers
DP
Y Reg VW Passat Alarm. - Halmer
Agree with DP. Check carpets asap for damp.
Y Reg VW Passat Alarm. - Collos25
Air vents open ?