We are having a problem that the burner will come on, but right before the blower comes on, it looks like it is running out of gas. As soon as the blower comes on, it puts the flame out and the blower continues to run. The blower also seems to come on within 10-15 seconds of the flame starting which seems to be rather quick. We have been noticing a "hot" smell right at the furnace right after a heating cycle.

Hi coleman, I would suspect the high limit switch is cutting off the gas, hence the hot smell you mentioned. That being said I would check that the vent pipe is clear.

Grady may see this and have better advice. Good luck and stay warm.

Is this natural or LP gas? Is it unusually cold & wet where you are?