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Mazda3 Climate Control Questions

155 messages,  Last post on Sep 24, 2009 at 7:30 AM

You are in the Mazda3 Forum. Your Host is pf_flyer

What is this discussion about? Mazda MAZDA3, Mazda MAZDASPEED MAZDA3, Heating / Cooling, Hatchback, Sedan


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#129 of 155
Re: this might be a dumb question but... [mazdrvr] by ex_tdier
Apr 29, 2007 (11:44 am)
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Replying to: mazdrvr (Apr 28, 2007 6:39 pm)

The A/C cannot keep up with the hot air if you have the vents open letting outside air in. Use the recirc button whenever you use the A/C; even then, you may feel the A/C is inadequate.
 
To prevent or minimize mildew, just shut off your A/C, keep the airflow on and vents open for the last 10 minutes of your drive. However, the mildew smell has never been an issue with any of the 3's I have driven. I cant say that about other cars though.
#130 of 155
Re: this might be a dumb question but... [ex_tdier] by mazdrvr
Apr 29, 2007 (1:42 pm)
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Replying to: ex_tdier (Apr 29, 2007 11:44 am)

Thank you!! I just wasn't sure because when I had my 01' Protege (the old car) and I went my service advisor about it he told me to keep the vents open... Recently, we have been using the a/c a little and if I have on recirculate then later in the dday when the weather cools off and just recirc the air w/o the a/c it kinda of stinks so thats why I was wondering...
#131 of 155
Re: this might be a dumb question but... [mazdrvr] by autonomous
Apr 30, 2007 (7:44 am)
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Replying to: mazdrvr (Apr 29, 2007 1:42 pm)

... been using the a/c a little and if I have on recirculate then later in the dday when the weather cools off and just recirc the air w/o the a/c it kinda of stinks ...
 
To avoid the musty smell, you want to keep the air flowing. So, never turn the fan off (in other words keep it at 1 or higher). As mentioned, to avoid the smell, let the condensation developed by the AC dry off and not accumulate and start creating mold. Running the fan does this. Over the years, there is a greater chance to have mold, so you may want to have someone "clean" the system eventually.
#132 of 155
Re: Black interior part of the issue? [ex_tdier] by stallionre
May 05, 2007 (2:23 pm)
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Replying to: ex_tdier (Nov 06, 2006 10:56 pm)

I think the light sensor is on the windsheild. Right in line with the rear view mirror.
#133 of 155
Re: Black interior part of the issue? [stallionre] by ex_tdier
May 06, 2007 (12:08 pm)
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Replying to: stallionre (May 05, 2007 2:23 pm)

I think the light sensor is on the windsheild. Right in line with the rear view mirror.
 
yeah, that's where it is, in the same area as the rain sensors (for the wipers).
#134 of 155
Re: Black interior part of the issue? [ex_tdier] by stallionre
May 06, 2007 (5:17 pm)
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Replying to: ex_tdier (May 06, 2007 12:08 pm)

Yup, I just check the sensor and it is right there. Good eye. By the way, a windsheild cost $900.00 for the Mazda 3 GT, since it has all these sensors made on the glass. OUCH!!!
#135 of 155
Compressor runs even when heat is on? by rcwitty
Oct 26, 2007 (9:47 am)
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I have a 2007 Mazda3 S and whenever I turn the heat on or the a/c on, I can hear something like a compressor turn on. It rattles and hums for a few seconds and then turns off. This cycle repeats itself over and over every few seconds as long as the air is flowing. If I turn the knob back to zero (effectively stopping the heat from flowing) the sound stops. Is this the compressor? and if so, should it be running when the heat is on?
 
Thanks
#136 of 155
Re: Compressor runs even when heat is on? [rcwitty] by pf_flyer HOST
Oct 26, 2007 (9:56 am)
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Replying to: rcwitty (Oct 26, 2007 9:47 am)

That SOUNDS like an AC compressor starting up, but not being a 3 owner, I can't go out to mine and duplicate the noise.
In most new cars, the AC compressor is on when you're on the defrost setting. You didn't mention whethere or not this is happening on defrost, so I thought I'd ask.
 
The fact that it cylces on and off doesn't sound right. I get the start up noise of the compressor when I first start up my heating/cooling system, but just that first time, not over and over again.
 
That part sounds like you might want to have your service guy check it out.
 
It might turn out that all this is normal, or they will say it's normal and you just happen to be focused on it.
 
Any 3 owners out there experiencing something similar?
#137 of 155
Re: Compressor runs even when heat is on? [rcwitty] by tomkozski
Oct 26, 2007 (1:41 pm)
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Replying to: rcwitty (Oct 26, 2007 9:47 am)

The compressor cycles on and off when the a/c is on. It doesn't stay on the whole time. Also, the a/c (the compressor) will turn on automatically when you select the floor setting or beyond (like when you need to defrost/defog the front windshield), even if the temp is set to the hottest setting, as long as it is above 32F (0C) outside. This part is explained in the owner's manual. So, basically, what you're hearing is normal.
#138 of 155
Re: Compressor runs even when heat is on? [tomkozski] by rcwitty
Oct 30, 2007 (11:19 am)
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Replying to: tomkozski (Oct 26, 2007 1:41 pm)

Thanks for the response. I did see something about this in the manual, but the sounds is quite loud. It also makes my car shake a bit when it turns off. What is that about?

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