Kenmore Gas Furnace Flame Sensor


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Old 09-25-22, 04:40 PM
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Kenmore Gas Furnace Flame Sensor


I want to make sure of the location of the Flame Sensor in my Kenmore gas furnace
Is it the flat rod located in front of the far end burner? [ Left side of the picture, two white wires]
My doubt came when looking at parts in a web site that shows a replacement for the igniter that looks exactly what I think is the Flame Sensor [ a flat strait rod] and a replacement for the F S [ round rod bent 90 degrees] with a single white wire that to me it is the Igniter [Right side in the picture]
Thank you
 

Last edited by RODEL; 09-25-22 at 04:44 PM. Reason: Mistake
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Old 09-25-22, 04:46 PM
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Pretty hard to see with the manifold pipe in the way.
A picture from a little lower would be more helpful.

Yes... the rod should be a single metal rod. It will have one wire connected to it.
It MUST be IN the flame and is typically on the burner the farthest from the feed side of the manifold.
Which would be left side in the picture.

No need to replace the rod. They never go bad. It's nothing more than a stainless steel rod.
Take it out and polish it with a green Scotchbrite pad or steel wool until it's shiny.

If you are having a problem with the furnace staying lit.... it could also be caused by a dirty/rusted burner. The burner flame must carry thru each burner to reach the flame rod. If it is delayed... the furnace will fail on ignition failure.
 
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Old 09-25-22, 05:31 PM
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I thought this is the igniter [bent rod] as it is located closest to the intake side of the manifold but it has only what looks like a single wire [or a cable with two wires?] and it is in the flame
What I thought is the F S [ strait rod] has two thin gauge white wires and it is also in the flame.
I can post a pic if needed
Thanks again
 
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Old 09-25-22, 06:06 PM
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Old 09-25-22, 10:40 PM
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The last picture is an igniter. It has two wires and glows when heated.
Be very careful as it is extremely fragile.

Usually the flame sensor is on the last burner so that all burners are lit.
 
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Old 09-26-22, 12:12 PM
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It is getting confusing for me.
May be I'm wrong to think that if the gas comes from the right side, the burner furthest to the left would be the last to light' and that rod was the F S [ last pic] and the igniter is the bent rod,right in front of the right hand burner which would be the first to light?
Thank you
 
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Old 09-26-22, 12:35 PM
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The gas enters the manifold from the right.
The igniter is usually at the first burner (right) and the flame sensor is at the last burner (left).
Yours would appear to be opposite.

What's the model number on that furnace
 
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Old 09-26-22, 02:31 PM
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From the Kenmore brochure when I bought the furnace is a two stage variable speed 76141 series
From the sticker inside the cabinet International Comfort Products
ModelCPMPVO75F1201
Serial AO83958705
Built Sept 2008
Lewisburg Tenn
Thank you
 
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Old 09-27-22, 04:15 AM
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Not sure the following is correct as I could not find your unit with the given model number but it is close.

ICP 1172533 Hot Surface Ignitor | Technical Hot & Cold (technicalhotandcoldparts.com)

ICP 1172827 Flame Sensor | Technical Hot & Cold (technicalhotandcoldparts.com)

 
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Old 09-27-22, 11:15 AM
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The parts seem to be the ones that are on the furnace
I don't understand why the FS is in front of the the burner closest to the right side where the gas comes from and in my mind that is the one first to light, and the igniter on the left burner that I thought would be the last to ignite been the furthest away from the gas intake
Thank you
 
 

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