I will have to check it out more but what i did do is right after it happened i let it cool and turned the pump back on and the tank filled and the pump stopped.I turned the hot water heater back on to see if it would work after i let it cool.The water heated up and no steam.I could not do much because i ran out of fresh water in the tank and it was raining hard outside.I didnt plug the instant hot back,I was afraid too.I am away and plan to check it out more when i get to it.I guess i will leave well enough alone if not using the instant hot fixes things.