Posted by Hal/ Eastern WA on February 24, 2014 at 13:35:01 from (97.114.109.222):
In Reply to: Furnace Ignitor posted by El Toro on February 24, 2014 at 06:57:09:
I just had to replace the ignitor in my Rheem natural gas furnace last week. I believe the original one lasted more than 17 years.
The replacement part looks like the one in your photo, but mine cost me $50. It was fairly easy to replace and since the old one quit getting red hot, the problem was pretty easy to diagnose. When I checked the old part with my meter, it showed open.
It looks like the element on the new part is about half as thick as the old one was. I wonder if I will get anywhere near 17 years of use out of the replacement part? I bought a second one for a spare to keep on hand.
For the last year or so, my furnace would sometimes not stay lit on the first try, and the ignitor system would cycle again, sometimes 3 times until it would stay lit. I read in the manual that came with the furnace that the flame sensor should be cleaned with steel wool if the ignitor system cycles like that. So I figured out what the flame sensor must be and carefully cleaned it with fine steel wool. Since that time, the furnace has lit properly every time I watched it. I wonder if the failure of the original ignitor might have been at least partly caused by the dirty flame sensor causing the ignitor element to cycle so often.
If I have any more trouble with the furnace not staying lit like that, I will replace the flame sensor.
Other than changing filters, I have never worked on that furnace before. It has always worked just fine for me. Real glad I could fix it myself!
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