motor is shot i now its a new one you have fitted but dont be suprised when the motor goes down.... they are not very strong did you get just a motor or the motor with the modified housing .... its on a timer then when it returns up it hits the hall effect transmitter and terminats its the one with the white paint on i have fitted new motors and heard them strip the teeth on the way down then the bin does not sit level make sure the hall effect transmitter is correct way around and check there is also no play in the alan key if there aint the motor is gone the only other thing you can check is you have the correct speed motor if there is any play in the bin check the shaft and the key if tight get a new modified motor