Main burners wont stay lit on my Natural Gas furnace?

Corsair by Rheem furnace.

What Happens:
Call for heat
Evacuation fan comes on (not sure of the tech term for the evac fan)
Ignitor gets hot (had it replaced a year ago before I knew more about furnaces)
Single burner lights over ignitor
All burners light, ignitor turns off
Main blower fan comes on
All burners go out, both evac fan and main blower continue to run
Ignitor comes back on
Single burner, then all burners re-light like normal
Heat resumes being produced
***
Sometimes this happens only once until the t-stat is satisfied, other times it happens two or three times.

Ideas:
Replace flame on probe?

chris2014-12-30T09:24:58Z

Favorite Answer

If your flame sensor is the kind with one wire, it makes an electrical connection to the burner manifold through the gas flame on the last burner. Over time it gets oxidized. This sensor can usually be cleaned up with a bit of steel wool and is as good as new.

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