I have two Luxaire furnaces in the house, same model. They both worked fine until a couple of days ago, when one of them didn't blow warm air anymore. My first thought was the igniter, so I replace it together w/the flame sensor. But comparing the two systems, they act a little different in the timing between the igniter and the gas valve.
On the good one, the igniter turns on, after abt 5 seconds the gas valve opens (I hear a click) and the burner lights up, and after another 2-3 seconds, the igniter turns off. As one would expect.
On the not so good one (the one in which I changed the igniter), the timing between the igniter and the gas valve seems to be a bit off. I see the igniter turning on, after abt 7-8 seconds, it turns off, and only after that the gas valve opens (I hear the click) and the burner ignites as the igniter still has some thermal inertia.
Is there a way to adjust the timing between the igniter and the gas valve from the control board? Or is it something else at play?
Thanks so much for any ideas, Serban.