I too, had to register just to THANK-YOU!!
I am a female that has had nothing but bad luck lately
..(sitting right now getting my air in my car fixed)...
Well not to change my luck I was taking a shower after mowing my 6acres and NO HOT WATER!!
My home is only 7 years old...warranty on hot water heater 6 years (haha).
Looked at the LED panel and seen I had a systems lockout problem.
googled it and found your solutions.
Printed off your solution along with your pic.
Called my son's dad (good think I never raised his child support payments when my son was young)
and with a little whinnning he came over and fixed it no problemo.
My finished walkout had flooded a few months ago and they just finished drywallying so the dust probably caused the issue.
Thank-you soooo much!!!