It was 103 today and I condemed a heater. lol
Had a no cool call this afternoon on a Trane package unit. Went to put the guages on and noticed this.
That got me curious, so I pulled the top to check out the heat exhanger. All but one tube looked like this, and I'm sure it wasnt far behind.
This is the 4th trane I've condemned this year. The others had bad duct, but the static on this one was fine.