The screw and slide rails on my 09 Cambria were gummed up and it caused the motor to shut off on it's internal protector. Be sure it isn't jammed somehow and check if there is maybe something holding it from going out. between my bed and wall is a great place for items to fall. I removed the mattress, a few screws holding the plywood platform and then everything is visible. Like a garbage disposal, sometimes they need a nudge.Mine also has an access to insert a socket to turn it back in manually if the motor failed, check for that.