I have a AO Smith GPSH 50 200 water heater that's 10 years old that I strictly use over the winter for hydronic heat in basement floor (1850 sq ft). 2 years ago the White Rodgers Intellivent Gas Control went out so I replaced it. This year when I turned out the floor it worked fine. I shut it off since it was still too warm to use. I went to turn it back on and the gas control was reading lockout. Shut off and turned back on and worked fine. Then it stopped working all together. No lights no matter what I do. I though maybe it was the blower assembly. I replaced that and it made no difference. Any ideas or is it time to put out to pasture?