I don't believe it was ever a transformer issue might start checking your low voltage wires for shorts and could also be the 24 volt coil in your contactor outside, could be the board but I doubt it.
Originally posted by cribbetr
The transformer has been replaced
Experience is a hard teacher because she gives the test first, the lesson afterwards". -Vernon Law-
"Skilled Labor Isn't Cheap, Cheap Labor Isn't Skilled" - Unknown