We have recently had a power outage in our city and ever since then my hot water tank has been acting up. When our power first came back on the water was way too hot, then it wasn't running hot water at all. I pressed the reset button and now it comes and goes as it pleases. I had to push the reset button on it twice and now I barely have enough hot water to shower with. Can you tell me whats wrong and How I would fix it?