Heil DC90, no heat
I have a Heil DC90 in the attic of my garage, that is not working. The draft inducer fan comes one, the vacuum switches all trip, the HSI glows, but the main burner never comes on. The HSI just keeps glowing. Most times, I can see a small "pop" of a gas flame hear the pilot assembly, but it is impossible to view the pilot flame through the sight window.
I removed the pilot assembly, and carefully cleaned the flame rod with some scotchbrite, but I have not reinstalled the pilot assembly yet.
Just looking for some ideas on what to check next, if this doesn't work.
Is it OK to hook up the pilot assembly to the gas valve, outside of the burner box, to check the flame operation?