I was talking to a guy in the field the other day about a furnace I worked on that did not have any power to it. It was a weatherking 80pj model and because of a power outage it would not come on. So I did a trouble shoot and discoverd that the ground wire on furnace that leads to the breaker box was not connected. And that the board was not getting any power and I checked the transfromer I was not getting 24v to the board. When I told him this he said thats not the cause of the problem. But when I was in tech school I was always told to make sure everything was grounded before you start a unit. Please can someone prove me right or wrong about this? We talked about this for hours and he still say's that I'm wrong!!