I got this long time customer with a Carrier air handler.(Trane outside)
Since 2002 I've put in 3 evaporator coils. Now its leaking again.
I sold the customer a new system.(Lennox)
All exposed copper in the attic is black.
Have any of you pros seen this before???? What might be the risk to the new unit??? OR, is this just a Carrier thing????.......I have seen this alot out of Carrier but not this bad..