Garage door openers made after 1993 are equipped with sensors positioned on both sides of the vertical rails.
Garage door won t close no blinking light.
This most likely indicates that the garage door sensors are out of alignment or there is something in the way of the sensors.
Check safety sensor alignment.
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Count the number of times the led light beside the learn button flashes before it pauses and begins blinking.
Press the remote control.
Garage doors comprised many moving parts and a single faulty component can prevent your garage door from closing.
If motor unit does not activate disconnect door control wires from motor unit.
Disconnect wires at door control touch wires together.
Other signs include flashing garage door opener lights missing sensor light or flashing sensor lights.
Here are the most common garage door problems or breakdowns that will cause a malfunctioning door to not close.
Once you know that the lock button is not the issue you ll want to check to see if anything is obstructing the sensors or if the sensors.
Okay now that you know some of the common signs of garage door sensor malfunction you re ready for the next step troubleshooting.
Once you see the double flash press the control button on the remote control.
Once you push this button the light on the garage door opener will flash twice.
If this doesn t fix your problem then the problem is more than likely the safety reversing sensors.
If there s nothing blocking the safety sensors check their alignment.
This will explain how to troubleshoot a garage door opener that won t close the door and blinks 10 times.
If your garage door opener is still blinking try realigning the safety reversing sensors.
If motor unit activates replace door control.
Garage door off the tracks.
Here s how to tell if garage door sensor is bad five things to check.
Broken cable or cable off the pulley.
If the opener cannot detect that the safety sensors are properly working or connected then the opener lights will flash and the door will refuse to close.
Momentarily short across red and white.
Unlock the lock button press the lock button to turn this feature off.
Place a step ladder under the liftmaster motor so you can comfortably access the learn programming button.
Troubleshooting a liftmaster with a flashing light step 1.
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Inspect door control wires for a short staple in wire replace as needed.
The light will flash two times.