Call Intex today - the contact info is posted in this section of the forum. They've seemed to be very good about replacing dodgy bits of equipment.
But, in general salt systems are ONLY for maintaining chlorine levels when everything is going well; they are NOT for solving problems. Once your pool goes green, you need to switch to manual mode, till everything is cleaned up again. The Intex pool recipe in the Intex Chemistry section of the forum should help with that.