11-30-2009, 05:34 AM
deckeda wrote:
I once had a weak igniter. It lit, but poorly, or seldom, and there was the smell of unburned gas when the furnace ran (which is why we called for a repairperson.)
Just wondering if your igniter isn't fully up to snuff. Didn't watch all the steps he took but it seemed like a really simple swap. Part was less than $100.
I guess my igniter is like the one on this page:
http://americanhvacparts.com/Merchant2/m...creen=PROD&Product_Code=BURN252603&Category_Code=Bgoo
It's all the way to the right while the flame sensor is all the way to the left. I think the igniter only does its thing at the moment the gas valve opens, and the gas valve doesn't open until the flame sensor tells it it senses heat; I think there's some sort of a long thing that glows first.
Need some edumicatin' . . .
Or maybe the igniter transfers its heat into some other metal part (it sure looks like the glow spreads all the way across)-- reminds me of my coleman stove a bit-- doesn't burn well until the metal fins are all heated thoroughly. You can see the glow spreads a little farther due to the preheating effect the second time around, which is then enough to trip the gas valve.