Garage Door Sensor Repair

If your door opens fine but refuses to close, or starts closing and then reverses, the sensors are the most likely culprit. Check for blinking or dim LED lights on the sensors near the floor. If you see flashing lights on the opener unit itself, that's another strong indicator. Call us at (314) 400-8133 and we'll diagnose the exact problem.

Some sensor issues are simple to troubleshoot. Cleaning dirty lenses with a soft cloth, removing obstructions from the beam path, or gently realigning a bumped sensor can sometimes solve the problem. However, if the issue involves wiring, electrical connections, or sensor replacement, professional repair is the safe choice. Incorrect wiring can damage your opener or create new safety hazards.

Your door is reversing because the sensors detect (or think they detect) an obstruction. Common causes include misaligned sensors, dirty lenses, sunlight interference, loose wiring, or objects partially blocking the beam path. Even something as small as a cobweb across a sensor lens can trigger a reversal.

We strongly recommend against it. Safety sensors exist to prevent your garage door from closing on people, pets, or objects. A standard garage door weighs 150 to 400 or more pounds. Operating without functional sensors removes the only safeguard preventing that weight from coming down on whatever is in its path. Get the sensors fixed properly instead.

Repair costs depend on the specific problem. A simple realignment is different from replacing damaged wiring or installing new sensor units. We provide a clear quote after our diagnosis, before any work begins. You'll know exactly what it costs before we start. Our diagnosis is free in qualifying ZIP codes near Chesterfield (63005, 63017, 63011, 63021, 63038, 63040, 63088, 63131, 63141, 63122, 63124). Outside these areas, the diagnostic fee is $89 within 15 miles or $129 within 30 miles — both credited 100% toward any repair completed the same day.

If both sensor lights appear steady but the door won't close, the problem may not be the sensors at all. It could be an issue with the opener's logic board, the wall console, the close-limit switch, or another component. This is exactly why our 26-point inspection covers the entire system. We find the real cause.

With proper maintenance, garage door sensors typically last 10 to 15 years. Regular cleaning, keeping the area around sensors clear, and periodic alignment checks can extend their life. If your sensors are original equipment on a home built in the 1990s or early 2000s, they may be approaching the end of their useful life.

Yes. We service sensors on all major opener brands and install new LiftMaster sensor systems when replacement is needed. As a LiftMaster Authorized Dealer, we can also upgrade older sensor systems to current safety standards.

Direct sunlight hitting the receiving sensor overwhelms the infrared beam. The sensor can't distinguish between its own beam and the incoming sunlight, so it acts as if the beam is broken and prevents the door from closing. This is common in west-facing garages throughout the St. Louis metro. Repositioning sensors, installing sun shields, or swapping the sender and receiver can usually solve it.

Do not try to force the door closed or disconnect the safety system. If your door is stuck open and your home is unsecured, call us at (314) 400-8133. We offer same-day service and are available 24/7 for emergencies. We'll get your door working safely as fast as possible.