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Thread: Cracked heat exchangers
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09-08-2012, 01:14 PM #1
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Cracked heat exchangers
I don't know if this question has been asked.
Does anybody have any secrets or tricks to finding cracks or go to spots for different brands.
I know the carrier heat exchangers crack in the secondary or the rivet/ weld Demple
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09-08-2012, 01:29 PM #2
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There is a long thread in the pro forum with lots of pics, and tips on where to look.
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09-08-2012, 01:36 PM #3
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Moved to Tech to Tech forum.
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09-08-2012, 02:07 PM #4
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Unfortunatly I don't have access to the pro form yet
Sorry I thought it was in tech to tech
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09-08-2012, 02:11 PM #5
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Anyone have a link to it, or no which spot it's in?
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09-08-2012, 02:28 PM #6
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http://hvac-talk.com/vbb/showthread....nd-info-thread
Originally Posted by Joehvac25
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09-08-2012, 02:30 PM #7
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Awesome I knew someone would be better at finding stuff then me. Thanks Originally Posted by chuckcrj
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09-08-2012, 02:55 PM #8
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Last one I found, I had a real lazy burner and dark condensate, older janitrol. Told the homeowner the secondary was bad. When I pulled the the furnace out the damn secondary fell right out lol.
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09-08-2012, 10:02 PM #9
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A digital manometer to the pressure switch on gas furnaces.Turn the fan on on and if you get a reading...you have a cracked exchanger.
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09-09-2012, 08:00 AM #10
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There are classes/seminars on heat exchanger inspections. IMO they are worth many times the price of admission.
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09-09-2012, 09:55 AM #11
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Good to know. Thank you
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09-09-2012, 10:21 AM #12
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A good inspection camera will help as well.
My first journeyman told me a trick that I still use in tough cases. Pour water over the heat exchanger, if you can see inside the HX, the water will soak through.
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09-09-2012, 10:34 AM #13
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I guess it's a great question but I almost feel like you should be charged for the first answer. Lol. Although I will say rollout switches don't lie unless they are defective. Don't just hit the reset and leave as you will be back very soon to disassemble the unit in some cases.
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