In a Ceiling Fan Speed Regulator circuit by mistaken T1 and Gate connection is altered but regulator is still working good. What will be the long term effect ? In the image proper connection is drown.
Are you really, really, sure they are swapped? If they were I would expect the load to receive full power all time regardless of the pot settings and, depending on your load current and the triac and diac ratings, either or both may have a very short life.