Replaced gear drive unit due to worn out parts.
What does rpm sensor do on garage door opener.
The rpm sensor detects motor speed.
I ve already checked the contacts going to the board to see they.
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Motor runs this way with and without the limit switch assy on or off the unit.
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This basic procedure works for common craftsman liftmaster and chamberlain garage door openers.
How to replace a chain drive garage door opener rpm sensor liftmaster rpm sensor you replacing the rpm sensor on a garage door opener you how to replace a chain drive garage door opener rpm sensor.
If the rpm sensor breaks the garage door only moves 6 to 8 inches at a time and the led light flashes 5 times.
041c4398a is a rpm sensor replacement kit.
For use with various liftmaster and chamberlain garage door openers featuring a 5 bladed photo interrupter sensor.