Goodman single stage gas heater 问题续

https://bbs.wenxuecity.com/fdcj/1878970.html 

I bet on bad gas valve (not happy with HVAC company requesting change on both gas valve and control board). Got a friend with HVAC license to supervise/work with me on the gas valve change. It worked like ~1 wk before the problem occurred again. 

In anticipation of problem haunting me again. I bought replacement board already so I changed it right away. OK for 2wks now. 不听老人言，吃亏在眼前。

If your HVAC has intermittent problem, post it here and  

https://www.reddit.com/r/hvacadvice/