SpaNe, seeing your comment on the other post, your cover is a wear item, I am in a snow area, specially winter 2008, is it possible that you hit the cover and the membrane to cause it to fail to soon, we saw a lot of that last year,when shoveling off the 2-3 feet of snow multiple times . and the cost of operation, i think that is high, mine runs about 30-40 a month