A/C and heater
My '72 has A/C. It's not hooked up but it has what I'm guessing is the vents and fan that works separatley for the A/C only. Is that right. My heater and defrost have sepatate controls. The A/C fan works great. My concern is that the heater fan dosen't work well. It blows a little but not nearly as much as the A/C fan. What should I do???