The Partridge Family (1970)

S3E15 For Whom the Bell Tolls... and Tolls... and Tolls

Ruben decides to enhance security at the Partridge home by installing a burglar alarm. However, the family accidentally triggers it so frequently that they eventually learn to tune it out. When an actual thief breaks in, the chaos of false alarms leads everyone to dismiss the situation, unaware that this time it’s a genuine threat.