Well I did it, I called a tech in from the place that installed the furnace 12 years ago....... he was somewhat puzzled. Finally he said he needed to go up on the roof because he really felt that the exhaust was somewhat blocked as the fire box was warmer than he felt it should be.
The exhaust and intake utilize a single pipe when it goes through the roof....a concentric fitting (sp). For those that don't know, this is a cone shaped pipe with the point sticking up with the exhaust exiting the center and the intake coming from the bottom side of the cone.
So he climbs up the roof 10/12 pitch 2 stories! He comes down and I ask him if he learned anything...He says yes. Apparently when they installed the furnace and the PVC runs they crossed them and the intake was sucking from the center and the exhaust was exiting from the intake air port
With the new inducer motor this was enough to trip the pressure switch.
So they will be fixing this issue shortly
and I suspect for free
I doubt that I would ever have figured this out!
One question does bother me has this mess up been allowing poor quality air to circulate in our house for the last 12 years?
Thanks for your help!