Heil Gu105dd-1 Gas Furnace


Old 10-28-11, 06:23 PM
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Heil Gu105dd-1 Gas Furnace

The pilot light will not stay on when it is lit. It goes out when the valve is turned to the on position. The pilot light was on, when the thermostat was turned up the furnace came on for a short period then it went out. I tried to relight the pilot but it will not stay on.
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Old 10-28-11, 10:50 PM
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The first thing to check is the condition of the pilot flame. Please describe the pilot flame.

It should be a focussed blue flame, like a small blowtorch. If it is more like a lazy candle flame with yellow tips, the pilot burner needs to be cleaned.

Also, the pilot flame should engulf the top 3/8" of the thermocouple or thereabouts.
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