Garage door opener won't close
The garage door at my mother's house has an intermittent problem.
Sometimes it won't close. If I hold the button down, the door will go
down but when I let go of the bottom it starts going back up.
There isn't anything blocking the sensor.
The garage door opener is a Genie screw drive type that is about 15
years old.
What can I look for to diagnose the problem.
Thanks.
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