Heated Surface Ignitor?

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Old 01-03-10, 01:23 PM
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Heated Surface Ignitor?

Hey guys and gals
I have a Trane XE 70 that recently went out so i did a little research and i think the cause maybe the Heated surface ignitor.. ok now the problem is where to find the damn thing!

everything im seeing online looks something like this


and the only thing im finding on my furnace is this


is this even the HSI? am i totally off base?

Much thanks! Beer 4U2
 
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Old 01-03-10, 01:54 PM
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Your second image didn't work.

I'm sure we are all waiting with baited breath....
 
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Old 01-03-10, 02:10 PM
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Really? thats odd its showing just fine on my end..
and apparently i'm not able to post attachments either, so there goes that.. maybe i can put it on photobucket or something but in the mean time could you tell me where these hsi's are most commonly found?
the piece im looking at isnt very close to the pilot lite, so im a bit confused on how it would actually ignite the the thing..
 
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Old 01-03-10, 02:39 PM
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alright this should work a little better


and here it is again in reference to where the pilot light is..
hope this helps sorry for the crap pics
 
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Old 01-04-10, 09:46 AM
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Not a Hot Surface Igniter

That’s not a hot surface igniter. That looks more like a high limit safety switch. I believe that you will have to go to a certified Trane dealer to find it. FYI… If your system has a standing pilot, there is no need for a hot surface igniter. Good luck.
 
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Old 01-04-10, 09:52 AM
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THanks!

Hey thanks alot man sounds alot cheaper but then again im not sure if thats even the problem. i have a trane xe 70 and it says its a electronic ignition furnace - so im pretty sure there is no standing pilot. that being said i cant seem to find the HSI - so maybe im wrong
 
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Old 01-04-10, 10:30 AM
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The part in the top picture looks like a fusible link to detect a flame rollout problem

The lower picture shows the fusible link in place and the pilot burner below it.

The pilot burner looks like it has a mercury flame sensor to turn on the main burner when the pilot is properly lit.

So it looks like you might have an intermittent pilot ignition system with a mercury flame detection system.


Is the "wire" (actually very thin tubing) coming from the pilot tubing shiny bright like stainless steel? Does it go back to a fat black plug on the gas valve?

What is the make and model of the gas valve?

Some additional pictures of the furnace controls would be helpful.
 
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