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If the air outside is hot, that air comes in to the car --- hot.... If your car is a dark color, the air will come in even HOTER than its ambient outside temperature, 'cause the system under the hood is hot. A white car would be cooler under the hood than a black car, naturally.
You need to test it on a COOL DAY, or a cool night, when the temp. outside is say 65. Then, if air comes in hot, your heating system is probably "leaking" hot air in.
You need to test it on a COOL DAY, or a cool night, when the temp. outside is say 65. Then, if air comes in hot, your heating system is probably "leaking" hot air in.
