Original message
| ruckter
 |  "Carrier Furnace Igniter"
, posted Wed 17 Dec 09:47  
I have an old Carrier gas furnace model 58GS125-2. It has been hanging in there but I have started to notice something strange.
The furnace has hot surface ignition instead of a pilot light. When heat is called for I can hear the snapping from the furnace. Soon after the snapping started (1 min or so) I would hear the woosh of the burners coming on. Soon after than the fan would start circulating the hot air.
During this heating season I have noticed that the igniter will snap for a much longer time before lighting the furnace. Now it takes almost 5 minutes before the the furnace is ready to heat.
Do these symptoms point to any part in particular? Is there something that could just be cleaned?
I plan on having the furnace cleaned and serviced soon (it has been over a year) and I want to be informed when I talk to him about the problem.
Thanks for your help. This is a great resource for home owners.
Russell R.
Charlotte NC
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Replies:
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| xenos
Webmaster 
| "Re(1):Carrier Furnace Igniter" , posted Wed 17 Dec 17:26
Could this snapping come from a crack or short in the igniter or does it sound like dirt in the venting system?
Xenos.
The best way to escape a problem is to solve it.
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| | ruckter
| "Re(2):Carrier Furnace Igniter" , posted Thu 18 Dec 10:11
Interesting. I always though that the cracking noise (like the sparking of a spark plug) was normal for the igniting of the furnace. I was just concerned that it was taking longer to light than it used to.
I can look in the furnace while it is making the sparking noise and see a small blue spark.
Is this not normal?
Russell R.
Charlotte NC
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| | xenos
Webmaster
| "Re(3):Carrier Furnace Igniter" , posted Thu 18 Dec 18:04
Scott you originally said it had a hot surface igniter. A HSI does not spark however a spark igniter does. Thats why my answer was what it was. Now I have a new one. LOL
I would recommend sanding the flame sensor and igniter If it’s a spark igniter.
Xenos.
The best way to escape a problem is to solve it.
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| | ruckter
| "Re(4):Carrier Furnace Igniter" , posted Mon 10 Oct 23:49
Well, I let this problem go last year because the furnace would still eventually light.
Now I am gettting her cleaned up for this year and I wanted to sand the flame sensor and the ignitor on my BDP Model 733B pilot assembly. (furnace manual page 10 - upper right corner)The electrode is pretty easy to identify but where is the flame sensor? I am guessing that this is the problem because the pilot will light immediately but the electrode will keep sparking. The pilot will burn for a few minutes and the electrode will turn bright red but it will keep sparking. If I give the furnace a slight "fonzie" bump on the side it will stop sparking and the burners will light shortly thereafter.
Any suggestions for solving this problem? Thanks!
Russell
Russell R.
Charlotte NC
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| | ruckter
| "Re(4):Carrier Furnace Igniter" , posted Fri 19 Dec 16:22
Ah Ha! I should of known that it was a spark igniter and not a HSI. The only thing I really knew was that it did not have a pilot light.
Now I don't have to look stupid in front of my service technician, just here on the bb.
Thanks for the help.
Russell R.
Charlotte NC
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