How do I inspect my heat exchanger to see if it is cracked?


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Old 11-19-14, 02:16 PM
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How do I inspect my heat exchanger to see if it is cracked?

Hi guys

I came to the conclusion that my heat exchanger is cracked but I would like to see it actually. Is there any way to verify this?
Does anybody know what a heat exchanger looks like for an UltraMax Olsen HCS2 81AD
 
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Old 11-19-14, 03:10 PM
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Generally a full inspection of the heat exchanger requires taking the furnace completely apart unless you happen to have a fiber optic camera you can fish up into the heat exchanger. I couldn't find your furnace on Olsen's web site.
 
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Old 11-19-14, 06:42 PM
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It was made in 89, it is normal that is not on their site anymore
You can hardly find anything about it on Internet
 
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Old 11-19-14, 07:20 PM
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At 25 years old, it doesn't surprise me there is little on the web.
 
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Old 11-19-14, 07:40 PM
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It should surprise you that it still working!
Guess what I just adjusted the gas pressure and now the furnace is not short cycling anymore!
 
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Old 11-20-14, 06:12 PM
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I certainly hope you used a good manometer to set the gas pressure. That is something which done without the right equipment can be very dangerous. Read: CARBON MONOXIDE
 
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Old 11-20-14, 07:30 PM
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Can you elaborate a little bit?
I adjusted the pressure to be lower because the furnace was overheating

A quick read tells me that actually carbon monoxide can appear when the gas burning is incomplete due to not enough oxygen. Since I reduced the gas amount that enters my furnace I would say that there is less chances that this will happen since the amount of oxygen is the same as before

thoughts ?
 
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Old 11-21-14, 07:18 AM
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To a large degree, oxygen (air) is governed by the velocity of the gas going down the burner tubes.

Overheating can be caused by quite a number of things but the most common is lack of air flow across the heat exchanger because of ducts being too small.

If your furnace is overheating, check the registers (supply & return) for restrictions, make sure the air filter is clean & not restrictive (I prefer the glass fiber type). Also check the fan blades to verify they are clean. If all is well on those points, increase the blower speed.
 
 

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