Hot water heater, replace based on age alone?
We have two 50 gallon hot water heaters (electric), one was replaced in 09, and the other one is a 03 model, and the 03 one just quit working today. We have a home warranty that came with this home, and I will use it to get it fixed, but is there a point where the heater should be replaced due to age and probability of failure? I plan on asking the plumber if there is any chance that it can be replaced instead of fixed just based on its age, but I'm not too optimistic since it isn't leaking (yet). Any thoughts or suggestions are appreciated.