OK, when I use the remote to lock the doors, I get a beep and all doors are locked if I have manually locked the RF door. However, if I use the remote to lock the doors and the RF door has been left unlocked, no beep (other 3 doors lock). Doest that mean the the sensor is working?
If the motor has been replaced in the actuator and the door will still not lock with the remote, and, if the above indicates that the door lock sensor is operable, what else might be causing the problem?