Trane furnace works for a few hours, then burners will not fire
Originally Posted by peacebunny
I checked again...37v, checked multiple times. Furnace is running again now. I also checked the ignitor by unplugging it and putting the leads in the plugs. VM registered 122. When I switched the leads, it didn't register anything. Again, I did it a few times with same results. I followed the ignitor wires to test them at the control board, but I can't get to them. I smell NO gas except right before the burners really do fire, and I have a VERY sensitive nose. If there is gas, I'm smelling it.
You didn't check the ignitor, you checked to see that the control board was sending voltage to the ignitor and yes, it is. Connect your leads to the ignitor leads and OHM it out or test continuity. Then with it plugged back in test amp draw of the ignitor as it's working/glowing. You may need a meter with a clamp that fits around the wire for amp testing. That is how you test the ignitor itself but if it's working then I guess you don't really need to at the moment.