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Greenbrier Friedrich GUB100NDCI

6K views 7 replies 2 participants last post by  kenmac 
#1 ·
I could not find a Serial Number. This is an old NG two burner furnace - 100,000BTU. Pilot light comes on but main burners do not. Does anyone know what type of pilot sensing device this unit has? It looks like a thermocouple. Is there a way to check it with a VOM? I didn't have my VOM with me so I couldn't check to see if the main burner was getting 24V but I will check that later this week. I don't want to buy a new pilot sensor unless I can prove it is the culprit.

I wonder if I can even get parts for this unit? Thanks for your help.
 
#3 · (Edited)
Did you push down a knob on the gv to light the oilot ?? If so. make sure you turned the valve / knob to the on position.. I would have that furnace inspected b-4 use it it's that old
This is my nephew's furnace. I was there helping his daughter with her algebra homework. I didn't have any tools with me but my nephew asked me to take a look. The pilot comes on the way it should on a call for heat. This was the first time this season he called for heat. There is a black box which sits on top of the GV. I assume there is a control board in there.

Do you know how old this unit is? Can you answer my original questions about the pilot sensing device? Thanks.

PS Because this unit has electronic (vs standing) pilot, does that mean the pilot sensing probe is a flame sensor and not a thermocouple?
 
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