Why Sensors Cause So Many False Alarms
A pair of small sensors, mounted close to the floor at each side of the doorway, project an invisible beam across the opening. If the beam is interrupted, the opener will not close, or it reverses. They are simple devices, and they are easily bumped, smudged or fooled by direct sun.
We diagnose the pair, including wiring and brackets, then restore a clean, aligned signal. Safety features are never bypassed, and we confirm the door reverses properly before leaving.
Symptoms That Point to Sensors
Door will not close
The opener flashes lights or beeps, and the door refuses to descend. A blocked or crooked sensor is a common reason.
Reversal partway down
A door that heads for the floor and then bounces back may have a beam that wavers because of vibration or dirt.
Indicator lights off or dim
A dark or flickering light on either sensor suggests a loose wire, a failed unit or a bracket that has been knocked sideways.
How We Restore the Beam
- i
Look at both units
Lenses, brackets, wiring and indicator lights are examined to see which sensor is the source of the problem.
- ii
Clean and realign
Lenses are wiped, brackets are tightened and each unit is aimed until the indicator shows a steady, confident signal.
- iii
Repair wiring or replace
Damaged wire is spliced or run fresh, and failed sensors are replaced with a compatible pair.
- iv
Test the response
Close the door while we place an object in the path, so you see it stop and reverse as it is designed to do.
Sensor Questions
Can I disable the sensors temporarily?
We do not recommend it. Disconnecting the sensors removes an important protection, especially where children and pets are around, and it is rarely a lasting solution. Repairing them properly is usually a quick job and keeps the door behaving as it was designed to.
Why does sunlight affect my door?
Strong light entering a sensor lens can wash out the signal, particularly at certain times of day. Shading the unit, repositioning it or replacing a lens may help, depending on how the garage faces. We examine it with the door in the problem condition.
How do I know which sensor is faulty?
The indicator lights usually reveal it. If one is dark, dim or blinking, that unit or its wiring is the suspect, although a technician can test both properly. Swapping parts blindly can waste effort, so diagnosing first saves time.
Garage Door Won't Shut?
What are the little lights doing, and how does the door respond to the wall control? That short account often points directly to the cause.
Describe the blinking lights — (239) 456-3391