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CX-9 Ventilation Problems

10 messages,  Last post on Mar 22, 2008 at 3:34 PM

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What is this discussion about? Mazda CX-9, Heating / Cooling, SUV

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#7 of 10 Re: CX-9 Ventilation Issues [pulleydog] by nxs138 Mar 14, 2008 (4:58 pm)
Replying to: pulleydog (Mar 14, 2008 4:24 am) Wow, that link really goes into detail. I guess I'm just repeating stuff in the link now, but I'll clarify the point I was trying to make:   If you turn on the blower immediately after shutting off the AC, you are indeed introducting humid air into the vents, which might form into dew. However, with a constant flow of air this dew should mostly evaporate, especially since you are now bringing the ductwork to the same ambient temperature as outside.   So it's the constant flow of air that's important. I was once told to leave it on full blast for 2 minutes with the windows cracked a bit once you have parked the car, but I'm usually too lazy to leave it on that long... Replies to this message: steve_ (Mar 14, 2008 5:15 pm) pulleydog (Mar 20, 2008 5:48 pm) nxs138 (Mar 22, 2008 3:34 pm)
#8 of 10 Re: CX-9 Ventilation Issues [nxs138] by steve_ HOST Mar 14, 2008 (5:15 pm)
Replying to: nxs138 (Mar 14, 2008 4:58 pm) Nice nutshell version.
#9 of 10 Re: CX-9 Ventilation Issues [nxs138] by pulleydog Mar 20, 2008 (5:48 pm)
Replying to: nxs138 (Mar 14, 2008 4:58 pm) nxs & Steve - thanks for the info!   Hopefully this doesn't sound dumb, but when it is warm and humid out, would it be more advantageous to run the A/C on HOT, instead of turning the A/C off altogether and running the fan to introduce outside humid air?   I'm wondering if adopting your thought process of running the ventilation system for a period of several minutes for the purpose of minimizing condensation in the vents could be accelerated by continuing to run the A/C (which would be low in humidity) but switching it from Cold/Cool to Hot/Warm would acclimate the ventilation system and prevent or minimize condensation as originally intended.... but perhaps only needing to run it for say, 30 seconds.....??   Since you mentioned being "too lazy" to leave it on that long - I think most of us are just as impatient and those 2 minutes might seem like 10, so we probably wouldn't be apt to do what we should be doing to minimize the effects of this.....but maybe the "30-second method" would work???   Just a thought....feel free to blow my lame theory out of the water! Replies to this message: nxs138 (Mar 22, 2008 3:34 pm)
#10 of 10 Re: CX-9 Ventilation Issues [pulleydog] by nxs138 Mar 22, 2008 (3:34 pm)
Replying to: pulleydog (Mar 20, 2008 5:48 pm) Actually, you're right: I was told that putting it on hot would be better, for the very reason you mentioned. The main reason I don't turn it to hot is simply because my HVAC system is digital, and it would require too many clicks of "TEMP UP" (now talk about being lazy...this is where a good old knob would be better)--never mind that I already have to click a whole bunch of times to get it to full blast.   What I do is 1 minute or so before I get home, I just turn off the AC and turn up the fan speed while cracking a window. The window cracking is important I think since you will initially feel the air getting moist as it reaches ambient, and you don't want all that hanging around in the car.   I've had my car 7 years now, living in southern Indiana for 2 summers, then Charlotte, and never had that mildew smell. So either my little system works, or either Audi designed a HVAC system that doesn't mildew up (and I doubt that, since everything else on the car seems to break!)

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