Channels Ask This Old House
Season 6, Episode 16 of 26 :  Leaky Skylight/Repairing A Light Switch

General contractor Tom Silva helps a homeowner replace a skylight that leaks water into the kitchen below. In the Ask This Old House loft, Tom, along with host Kevin O'Connor, plumbing and heating expert Richard Trethewey, and landscape contractor Roger Cook ask, "What is it?" Electrician Peg Preble shows Kevin how to troubleshoot and repair a faulty 3-way light switch.

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