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what is the diagnostic code saying?
Bottom door has a quarter sized window in it.
Are you familiar with this round view port?
See if this is your unit - http://www.docs.hvacpartners.com/idc/groups/public/documents/techlit/58p,r-13sm.pdf
Figure 3..the bottom door...do you see the round circle in bottom door?
So what is sequence?
exhaust fan starts...ignitor glows...but no flame?
does gas valve click during these cycles?
Do you have a voltmeter to se if valve gets 24v or not?
I did what you suggested and I am still not getting any voltage to the gas solinoids.
Sorry my power went off.
If it is the control board where can I get one and approx cost.