3A eng. Control box intake air pre-air filter

[Al Streicher]

There is a control box attached to the air filter housing. It controls warm
air from exhaust manifold and cooler air from front of the car. Since I live
in a tropical environment, do I need heated air to start the engine. Can I
close the flap to block warm/hot air, without causing a problem. I don't
think it is working properly anyway because when I look at the flapper, it
is open to exhaust heated air on a 85F day, shuting off outside air. I would
think it should be closed, always.

TIA,
Al
1990 80 non-Q