Hummer Forums by Elcova - Fan wont turn off

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- Technical Discussion and Customizing your H3 (http://www.elcovaforums.com/forums/forumdisplay.php?f=26)

- - Fan wont turn off (http://www.elcovaforums.com/forums/showthread.php?t=12505)

hey guys, i just wanted to find out if this is a problem or something that is just normal on the vehicle. I noticed today that even when the climate control fan is in the off position, there is still air blowing through the vents when the vehicle is moving or maybe when just accelerating. Does anyone know anything about this? Can someone check if yours does the same thing? Thanks for your help!

mine does the same and I noticed on some other vehicles too, like Jaguar and Toyota.

Quote:

mine does the same

Mine does it too...I like it. Isn't it supposed to anyways, since the thing is set to vent? Press the button on the fan speed and it goes away.

Is the fan actually on, or is there airflow?

From the Owner's Manual:
(Off): Turn the center knob to this position to turn the fan off. With the fan off, you may still experience airflow from the system that increases with vehicle speed depending on the mode and temperature settings.
Enable recirculation mode to stop this airflow from occurring..

Quote:

Originally posted by Alec W:
H2’s are built better and don’t do this

No, they are just more aerodynamic and they air just flows around the vehicle

The fresh air is sucked in at the base of the windshield. Because of the rake of the windshield (or lack of) a high pressure air pocket is formed at the base of the windshield as you move. The high pressure air is forced into the vent system. Hitting recirc closes this intake vent and opens a recirc intake vent to the passinger compartment which will stop this from happening. This is how cow induction forces air into the engine compartment. This is also why cow induction is less effective for aerodynmaic vehicles like Corvettes with a smooth transistion at the windshield base and a sloped windshield.

I guess the fan isnt on but there is airflow while the vehicle is moving like you all mentioned. Turning the recirculation on takes care of it. Thanks!

Quote:

Originally posted by ChevyHighPerformance:
The fresh air is sucked in at the base of the windshield. Because of the rake of the windshield (or lack of) a high pressure air pocket is formed at the base of the windshield as you move. The high pressure air is forced into the vent system. Hitting recirc closes this intake vent and opens a recirc intake vent to the passinger compartment which will stop this from happening. This is how cow induction forces air into the engine compartment. This is also why cow induction is less effective for aerodynmaic vehicles like Corvettes with a smooth transistion at the windshield base and a sloped windshield.

don't you mean COWL induction?

I have seen a few cars with COW induction... It ain't pretty. Cows don't fit through small openings very easily.

Similar to moose induction?

Quote:

Originally posted by aetherH3:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by ChevyHighPerformance:
The fresh air is sucked in at the base of the windshield. Because of the rake of the windshield (or lack of) a high pressure air pocket is formed at the base of the windshield as you move. The high pressure air is forced into the vent system. Hitting recirc closes this intake vent and opens a recirc intake vent to the passinger compartment which will stop this from happening. This is how cow induction forces air into the engine compartment. This is also why cow induction is less effective for aerodynmaic vehicles like Corvettes with a smooth transistion at the windshield base and a sloped windshield.

don't you mean COWL induction?

I have seen a few cars with COW induction... It ain't pretty. Cows don't fit through small openings very easily. </div></BLOCKQUOTE>

Quote:

Originally posted by HUMTECH:
Similar to moose induction?

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by aetherH3:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by ChevyHighPerformance:
The fresh air is sucked in at the base of the windshield. Because of the rake of the windshield (or lack of) a high pressure air pocket is formed at the base of the windshield as you move. The high pressure air is forced into the vent system. Hitting recirc closes this intake vent and opens a recirc intake vent to the passinger compartment which will stop this from happening. This is how cow induction forces air into the engine compartment. This is also why cow induction is less effective for aerodynmaic vehicles like Corvettes with a smooth transistion at the windshield base and a sloped windshield.

don't you mean COWL induction?

I have seen a few cars with COW induction... It ain't pretty. Cows don't fit through small openings very easily. </div></BLOCKQUOTE> </div></BLOCKQUOTE>

As a person who has hit a cow at about 30 mph, pieces of the cow will fit through all large and small openings. Ain't pretty, for either the vehicle, the Cow or the driver. Obviously the driver lived, vehicle and Cow died.

(No, I did not get to take the steaks home.)

Quote:

don't you mean COWL induction?

I have seen a few cars with COW induction... It ain't pretty. Cows don't fit through small openings very easily. </div></BLOCKQUOTE>

What the flip was I typing (I screwed it up twice)??? Cowl it is!