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Old May 25, 2021 | 08:12 AM
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Mcfancy14's Avatar
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350 GLE 4matic
Ventilated seats

I've noticed that when I turn on either the driver or passenger side seat ventilation switch , sometimes the activate and you can her the fan quite clearly, and other times nada.,...any thoughts why they don't always turn on?
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Old May 25, 2021 | 10:59 AM
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Same here. Worked that way in my BMW 750 as well.
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Old May 25, 2021 | 01:00 PM
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2021 GLE 63
Originally Posted by Mcfancy14
I've noticed that when I turn on either the driver or passenger side seat ventilation switch , sometimes the activate and you can her the fan quite clearly, and other times nada.,...any thoughts why they don't always turn on?
I've never heard mine running but as mild as the effect is, I do notice it varies widely each time how much I feel it. Of course I'm sure it depends what you're wearing. Does anyone know if it's just a fan under the seat and fully independent of the air conditioning system? does it pull air from under the chair?
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Old May 25, 2021 | 01:31 PM
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To me, it's a lot more noticeable when the AC is on.
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Old May 25, 2021 | 01:59 PM
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Originally Posted by Daso
I've never heard mine running but as mild as the effect is, I do notice it varies widely each time how much I feel it. Of course I'm sure it depends what you're wearing. Does anyone know if it's just a fan under the seat and fully independent of the air conditioning system? does it pull air from under the chair?
GM was the last I knew of using the Peltier cooling method as an independent source. They stopped using it because it blew hot air into the rear making passengers uncomfortable.
I don’t recall seeing any ducting under the seats to accept AC air so it’s probably just blowing untreated air.
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Old May 25, 2021 | 02:01 PM
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I believe that's why they characterize them as "ventilated" as opposed to "air cooled".
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