COLEMAN FURNACE MODEL 8623-779 I HAVE CLEANED THE WHOLE FURNACE AND STILL DOES NOT BURN RIHT I AM THINKING MY BURNER IS SHOT THERE ARE NO LITTLE HOLES IN IT LIKE A GAS STOVE OR GRILL IT IS A SOLID OPEN GROOVE IN THE THREE BURNERS AND DOWN TH ELENGTH OF THE BASE? PILIOT LIGHT LIGHT ONCE AND NOW I GOT TO LIGHT IT MANUAL AND IT FLICKERS OUT . LIKE I SAID ITS NOT BURNING RIGHT ITF ITS BURNING AT ALL AND WHEN FAN COMES ON IT BLOWES IT OUT????
There is a thermocouple "wire" that is supposed to be touching the pilot flame.
The thermocouple senses a flame (hot) and allows the heater to operate. If the thermocouple does not sense that the pilot is on, then it will not allow the furnace to operate.
Bend the thermocouple wire (or the pilot tube) so that the pilot flame is touchingg the thermocouple.
That shouls work now.
The air from the fan should not be blowing through the same cxavity that the pilot is in.
If it is, then you may have a leaking furnace whereby carbon monoxide may be seeping into your living quarters.
If the fix above works and the pilot stays on after the heater starts, then there is probably no leak.
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