Comfort furnace
#1
12-27-16, 12:33 PM
Join Date: Dec 2016
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Comfort furnace
My furnace starts up then pilot light ignites but main burners do not come on,does anyone know what would cause this.
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#2
12-27-16, 12:47 PM
Member
Perhaps more info would help us help you more. Make, model and serial, control type, any troubleshooting you've done so far.
Does the pilot stay lit? What's the MA signal from the flame sensor?
Does the pilot stay lit? What's the MA signal from the flame sensor?
#4
12-27-16, 01:38 PM
Member
Possible a dirty flame sensor rod or poor pilot flame. The pilot flame should engulf 1/2 to 3/4 inch of the flame sensor rod. If it does, the flame sensor may need cleaning. Clean it carefully with steel wool or other very fine abrasive. Be careful not to damage the hot surface igniter, which is between the pilot and the flame sensor.
If the pilot flame doesn't engulf the flame sensor sufficiently, the pilot burner or orifice may need to be cleaned.
If the pilot flame doesn't engulf the flame sensor sufficiently, the pilot burner or orifice may need to be cleaned.
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