Alarm going off

[AlexHerts]

Ive got a Cobra 4600 alarm fitted to my van, and every few days it will set itself off for no apparent reason.

It keeps flashing up the door sensors, but as far as I can tell they are all closed, and not being tampered with. The van locks and unlocks with no problems.

What should I be checking?

[Altransit]

Falling battery voltage is one of the reasons that some alarms go off falsely, maybe worth checking the condition of your aux battery (if you have two)