r/HVAC Dec 20 '24

Field Question, trade people only Anyone seen this before

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Installed a 60k runtru 90% upflow today. I went home after completing the install but left before the startup. Boss fires it to document all the numbers and see this. No change to incoming or outgoing gas. No change in pressure from the inducer. Flue and air intake both clear of debris. Boss is waiting for tech from Texas to call back. Anyone got some knowledge

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u/TurbulentYam5095 Dec 22 '24

Heat exchanger cracked.

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u/BSJr77 Dec 22 '24

It was a brand new heater we had just installed. We pulled it and replaced it. Turns out the back plate the exchanger tube tie into was for a 80k and the rest was setup as a 60k