Remove any debris dust or cobwebs from the electric eye lenses on each sensor with a clean rag.
Rpm sensor problem garage door.
This is something to consider if you decide.
It could also be a problem with the logic control board of the opener but it is more likely to be the rpm sensor and given the cost of a logic board your best option would be to try replacing the rpm sensor first.
The logic board shuts off the motor and flashes the learn light 5 times when it doesn t receive speed signals from the rpm sensor.
This basic procedure works for common craftsman liftmaster and chamberlain garage door openers.
The door only moves 6 to 8 inches and then stops when the logic board isn t receiving speed signals.
Sometimes the sensor may be beyond repair due to wear and tear and in such a case your best bet is to replace the garage door sensor with a new one.
As suggested by the manual i purchased this sensor and replaced the old one.
Cycle the garage door through the opening and closing actions using the control on the garage wall.
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The rpm sensor detects motor speed.
If you cover all the other options then the sensor may have failed.
The error code indicated that the rpm sensor was causing the problem of autoreversing of the garage door.
The latest garage door sensors are technologically advanced and even allow you to control the opening and closing through an app on your smartphone.
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The rpm sensor monitors motor shaft rotation and sends speed signals to the logic board.