Obstruction or alignment
An object, dirty lens, bumped bracket, or vibration can interrupt the path. Do not bend a bracket repeatedly or assume both sensors should show the same light.
Why Is My Garage Door Sensor Blinking?
The light color and blink pattern do not mean the same thing on every opener. Identify the model and record exactly what the door does before moving a sensor.
Start with the symptom
- Does the door reverse before reaching the floor?
- Does one indicator stay off or blink?
- Does the problem change with sunlight, vibration, or weather?
- Do the wall control and opener lights show another code?
- Is the door crooked, binding, or reversing at the same travel point?
A sensor light can help with diagnosis, but it does not rule out track resistance, a damaged roller, floor contact, travel settings, wiring, or an opener fault.
Wiring or power
A loose terminal, staple damage, corrosion, splice, or opener power problem can interrupt a sensor circuit. Turn off opener power before any wiring inspection or repair.
Model-specific code
Use the opener model and manual to interpret indicator colors and flashes. Generic color charts can send you toward the wrong part.
Do not bypass the safety system
Do not tape a sensor, hold a control to force repeated closing, or increase opener force to overcome a reversal. Keep people and property clear and leave the opener off if required safety testing fails.
CPSC says openers manufactured for sale on or after January 1, 1993 must meet added entrapment-protection requirements. The rule permits specific protection systems, so not every compliant opener uses an identical photo-eye layout.
Garage door help across Northern New Jersey
Literally Garage Door serves Bergen, Essex, Hudson, Morris, Passaic, Sussex, Warren, Union, and Somerset counties. Call with the town, current door position, and symptom. We provide a free estimate before approved work begins.