I've got an LG fridge with ice and water dispenser that has a separate water dispenser button as well. That button appears to be stuck and I can't seem to get it to turn off. Obviously opening the door stops the water from dispensing. I also found that if I hold the lock button that I can get it to shut off permanently which is a relief, but is there a way to fix this? I've tried to "unstick" the button but to no avail. Is this something that can be fixed or replaced easily?