The Partridge Family: Season 3, Episode 15
For Whom the Bell Tolls... and Tolls... and Tolls (12 Jan. 1973)
Ruben has a burglar alarm installed in the Partridge home for their security. They keep setting off the alarm accidentally so much that everyone starts to ignore it. When a real burglar breaks in, no one realizes it is a real break in.
From $1.99 on Amazon Instant Video