Originally Posted by bausin
I really don't understand most of the suggestions in this thread. Why bother checking the pressure switch if the inducer motor is not starting? Or the gas valve?
Figure out why the inducer is not running first. Then we can get the braintrust here back to solving my problem. :-)
This is a pretty simple furnace - there are only few things that can cause the inducer not to start:
1> Bad door interlock (checked, fine - actually its now bypassed)
2> Bad limit switch - there are 4 - all checked fine
3> Bad inducer fan - it runs fine when voltage applied to it directly
4> Bad fan timer board - replaced with new one
5> Bad connections - checked all, unseated and re-seated.
Its all been checked, we have 4 hours into this, $500 and two tech visits and the POS still does not work. Never seen anything like it.