Hello forum members. new at posting, so please be patient.
I have rebuilt my 69 GTX convertible, AC car. Everything works as expected, A/C, Heat, Defrost and blower, but as we get to highway speeds, say 60 MPH and above, my heat quickly turns to cool air.
I don't know if I am losing vacuum to one of the Heater box pods, or the airflow is forcing open a vent door, but the heat stops working. I do not believe the cool air is mixing with the hot air and becoming cool. I think the hot air quits working.
Anyone have any suggestions.
Brad-TX
I have rebuilt my 69 GTX convertible, AC car. Everything works as expected, A/C, Heat, Defrost and blower, but as we get to highway speeds, say 60 MPH and above, my heat quickly turns to cool air.
I don't know if I am losing vacuum to one of the Heater box pods, or the airflow is forcing open a vent door, but the heat stops working. I do not believe the cool air is mixing with the hot air and becoming cool. I think the hot air quits working.
Anyone have any suggestions.
Brad-TX