Commented: Garage Door OpenerI would have sears come out and take a look. You are correct either the RPM Sensor is bad or the circuit board is bad. Should still be covered under warranty.
Commented: Garage Door OpenerCould be a bad antenna on the circuit board or some type of interference with the signal may want to throw some new batteries in the remote and see if that fixes it.
Other wise you can use a small ga...
