Garage Door Sensor Troubleshooting: Why Isn’t It Working?

When a garage door refuses to close, the most frequent reason is a garage door sensor not working. These safety sensors are designed to protect your family and property, but when they fail, you’re left with a half‑open door and no clue what’s wrong.

You might be asking yourself: do garage door sensors go bad? Yes, after years of use, the components can wear down and fail to send the right signals.

Another sign of trouble is when you see garage door sensors not lighting up. The tiny indicator lights tell you the sensors are powered and aligned. If the garage door sensor lights not on, your opener may not be receiving the signal, leaving the system unable to function.

𝙃𝙚𝙧𝙚 𝙖𝙧𝙚 𝙖 𝙛𝙚𝙬 𝙨𝙢𝙖𝙧𝙩 𝙜𝙖𝙧𝙖𝙜𝙚 𝙙𝙤𝙤𝙧 𝙨𝙚𝙣𝙨𝙤𝙧 𝙩𝙧𝙤𝙪𝙗𝙡𝙚𝙨𝙝𝙤𝙤𝙩𝙞𝙣𝙜 𝙨𝙩𝙚𝙥𝙨:

→ Wipe away dirt and check for obstructions in the beam path
→ Verify that both sensor lights are glowing consistently
→ Look for frayed or damaged wires leading to the sensors
→ Test the opener to confirm it’s sending power

If none of these steps restore the sensors, a replacement unit might be necessary. Ignoring the problem can not only keep your door from closing but also compromise safety.