Breaker was switched off - and I do not see the flame inside the little hole on the unit - does the flame always stay lit or just when the unit kicks on ?
Heating & Cooling - Goodman - GMS90703BXA Heater
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Answers & Comments
Your furnace has a hot surface ignitor that ignites the gas only when there is a call for heat.
I'm including a link to the installation guide for your GMS90703BXA gas furnace. Page 29 of this guide includes the "Sequence of Operation" for the heat mode. This will be a great help in getting a better understanding of how your furnace works.
http://www.alpinehomeair.com/related/GCS9%20GMS9%20Installation%20Instructions.pdf
Let us know if you found this helpful. If you need further assistance, let us know. :-)