Hey guys, I have a Lennox G43UF furnace (90% efficient) that is intermittently not lighting. The ignitor will come on (I tested the ignitor at 16.5ohms). The gas valve is getting 24v when it should be. I also have a manometer hooked up to the gas valve and even when its failing, the gas valve is putting out 3.5 inches w.c. I cleaned the orifices as there was a little debris on them, I have also checked to make sure my intake and exhaust are clear. Any help would be much appreciated!
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