Why Does My Smart Light Switch Not Work After Installation?

Most smart switches fail after installation due to wiring, compatibility, or setup issues. Many models require a neutral wire. Miswired line/load or traveler leads in 3‑way circuits can stop power. Some smart dimmers need a minimum load or compatible LED bulbs. Power may be off at the breaker. Wi‑Fi pairing or app configuration may be incomplete. Castle Electric installs and configures smart switches and follows Massachusetts electrical codes, including permits when required.

Quick checks:

• Confirm neutral present and correctly tied in.
• Verify line/load/traveler are on the right terminals.
• Turn breaker fully off/on and test voltage.
• Try a compatible bulb or add load.
• Reset and re‑pair in the app.

<br/> Updated: 2026-01-02 00:00:00 <br/> Need help in Quincy, MA? Call (781) 762-9891 or book online.