: a/c problem 1978 cad deville

04-30-05, 04:18 AM
My a/c is driving me crazy right now
it will only blow out the heater vents, correct temperature though,very cold too!
the defroster works like it should and the heater too, i'm lost, the only way i cAN make it blow out the top vents is to select bylevel, but then it still bareley blows any air out of the a/c vents,

my blower motor is fine , i think it is a bad programmer, or a vaccumme issue

any former cadillac a/c techs that know these systems
and know's how to fix it out there?

05-01-05, 02:31 AM
changed control head assyembly today no change it's still broken.