77 El Camino heat aif flow but no defrost
15

Asked by Imatinkerer Jan 06, 2019 at 12:57 PM about the 1977 Chevrolet El Camino Base

Question type: Maintenance & Repair

the heater and vent in my 77 El Camino (Classic trim) have air flow but when I
switch to defrost the airflow remains at the heater vent output (at the floor)

1 Answer
15

Imatinkerer answered 5 years ago

Found the problem: There is a spring that keeps tension on the directional door. the vacuum mechanism that shuts the door and directs airflow from the floor vent to the defroster could not overpowering the spring and so the door remains in the heater position. A slight adjustment to the spring and now the door shuts correctly and directs airflow to the defroster

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