Another common cause of light bulb failure i have found is that the brass tab in the bottom of the light bulb socket has been bent down too far and is not making contact and completing the electric circuit.
Garage door opener light does not turn on.
If your liftmaster garage door light won t turn off or on there is likely a problem with your door s motion sensor or light timer.
Try these steps to fix the issue.
A common cause of a malfunctioning garage door sensor is lack of power supply.
Disconnect the unit power.
Doing so will reset it but don t abuse this tip.
First disconnect the garage door opener from all power.
To install the new bulb just screw it in.
Garage door lights sometimes malfunction.
Light socket or logic board unplug the garage door opener then immediately plug the opener back into the electrical outlet.
There is an electrical issue in the opener.
Light bulb needs to be replaced in garage door opener.
More specifically if your garage door light won t shut off it is most likely due to one of these reasons.
Since you re up there take the opportunity to also clean out the housing area and be sure to remove dust from the socket.
Then reconnect the opener.
Put the screws back in and plug the opener back in.
If you find that your lights aren t turning off unplug and replug the opener.
If it s the light socket or logic board.
Plug the opener back in.
This is an easy fix but caution must be used.
If your garage door opener light is not working the fix might.
If your garage door opener craftsman liftmaster chamberlain genie sommer decko has no power but it is plugged in the circuit breaker is on and you know for sure the electrical outlet has power then there is something in the garage door opener that is faulty.
Sensor power reconnect the sensor to its power supply.
After 90 seconds reconnect the power and see if the lights come on.
If you hear a click replace the light socket if you do not hear a click replace the logic board.
If the light is still not coming on it could be the light socket or the logic board.
Look for small led lights on the sensors.
Step 5 lights still on.
Listen for the light.
Disconnect the wiring from the opener.
Brass contacts in opener light socket are.
Unplug the garage door opener then immediately plug the opener back into the electrical outlet.
In this situation the only option is to replace the logic board or the entire garage door opener.
If they re turned on in both the sensors then there is no issue with the power supply.
Reset the light timer to the lowest setting 90 seconds instead of 4 minutes.