How To Tell If My Heat Exchanger is Cracked? [With Pictures]

What's a Cracked Heat Exchanger and Why Should I Care? - A/C Masters Heating & Air Conditioning Inc.

HVAC tech told me that my heat exchanger had a crack on the inside portion of one of the rings. : r/HVAC

HVAC tech said this was a cracked heat exchanger in my 10 year old Trane XR 95. Is it? : r/hvacadvice

Damaged Heat Exchanger Signs - LA Construction Heating and Air

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Cracked Heat Exchanger: What You Need To Know - PFO Heating & Air Conditioning

Home Warranties And Cracks In Your Furnace's Heat Exchanger