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Stumped! Heil furnace.

11K views 35 replies 7 participants last post by  Doc Holliday 
#1 ·
I've got a 15 yr old heil furnace with issues. The fan kicks on, the glow igniter turns on, the pilot lights, but the main burner will not kick on. The gas valve is a year old and the igniter kit is 5 minutes old. I replaced it because it made since that that might be the problem.(but its not) any help would be appreciated.
 
#5 ·
if pilot lights as you have indicated then iot could be that the flame sensor is not positioned properly to sense the pilot flame ..it should be positioned to have tip in flame and be close to ground/metal area of the sensor bracket..also could be touching metal somewhere thereby shorting the sensor out to ground OR cracked insulator allowing short

OR bad board?
 
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