It is probably a sensor in the back that needs to be changed. The sensor is where the motor is in the back. Take the cover off and then the motor. You can buy a new sensor. If you need to buy one call 620-388-2857 for a new part they have reasonable prices.
Tengo una granite y no ay repuestos aquíen mi país guatemala porfabor mandarme la dirección y correo para contactarnos me urge el cambio de los repuestos
