Nothing to do with your problem, but a plumber friend when I asked about warranties on water heaters told me this. When you buy a six, ten, or twelve year warranty it's basically the same water heater, you're just prepaying the warranty insurance. I never buy extended warranties, home warranties or the like. I have found over the years, if you just figure you're saving 500 dollars a year on a home warranty for instance, if you don't have a problem for five years, you have saved $2500 and can use that to address the problem. I tend to buy new on anything, and usually have pretty good luck without buying any extra warranty. I'm an avid golfer, the new equipment every year promises to hit the ball farther, straighter, and more easily controlled. I've been listening to these claims for over fifty years. I figure with all the improvements over the years, a gold driver ought to go about 500 yards, surely a five iron is good for 250, and one putt from anywhere on the green. If I buy the right stuff, I ought to able to shoot about twenty on a good day for 18 holes.