Your heater is toast. Plan on a replacement tomorrow. Sorry, no fox on this issue.
That's what I was starting to suspect. What should I do to stabilize the heater until I replace? Turn off the water and gas to the heater?
Water you should deff shut off, gas is not an issue till you replace it.
Thanks. I'll start looking at a replacement tomorrow.
I recommend bradford White. They make a good heater.
DO NOT try for an on demand heater. They are NOT worth the cost.
Will do. Any other advice at this point?
I've heard that from friends.