EATC blows out defrost only.
replaced EATC same problem.
ordered 2nd EATC ( both dorman rebuilds)
same problem.
run jumper tube from black to other ports manually and it changes fine.
checked vacuum at black port and it has 20 psi vacuum. Shut car off and it held at 20 psi vacuum.
run jumper hose from black port to vac pin on EATC and checked the other pins for vacuum.
no vacuum anywhere regardless of position on EATC.
is this a 2nd bad rebuild or am I missing something ?