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Mazda CX-7 AC problems



  • Read about this in the manual. Does anyone know how to turn this "ECO" mode on or is it automatic?

  • vbbuiltvbbuilt Posts: 498
    ECO isn't something you's part of the environment controls.

    "Selection of A/C and A/C ECO is
    done automatically. Although air
    conditioning and defogging ability is
    reduced, the A/C ECO function is
    designed to economize use of the air
    conditioning system."

  • pctechpctech Posts: 43
    Living in upstate NY, I've noticed this exact problem since day 1. Have not yet been back to the dealer (some distance away) but will definitely mention it at my first oil change. I like getting fresh, ambient-temp air (with A/C off) from the vents and it's impossible with this car. I'm thinking the door that mixes heated and ambient air never gets to a position that avoids the heated air. I sure hope there is a fix as this is not acceptable on a $30K vehicle! :(
  • satz24satz24 Posts: 10
    hi all

    looking at buying a CX7 in Australia. I'm most concerned about the issues with Airconditioning performance (or lack thereof).

    I've seen some posts that talk about it being ineffective when not using Recirc.

    And also have seen that it blows warm air when on fresh-air (non AC)

    Is there any way of bypassing the 'auto- ECO' setting? I saw someone's post about the ECO setting on the Mazda coming on automatically but diminishing cooling performance.

    There's no way for me to test this at present as it's coming into winter here. But our summer (Nov- Apr) is very hot

    many thanks as I'm really worried about this and it's probably enough to make me wait for the Rav4 V6 which is not due for 3 months at least (but I suspect would have a good AC system)

  • vbbuiltvbbuilt Posts: 498
    Yes, it's a concern of many CX-7 owners. Some parts of the U.S. get blistering hot, as well. You didn't mention which model you were considering. The Grand Touring model has the automatic environmental controls. When the ambient temp is quite warm, the system automatically shifts into recirc and stays in that mode. Max cooling isn't achieved until the car has been running for a few minutes. If the car has been parked, it helps to open the windows for a bit and allow the interior air to vent, until you start feeling some chill air coming from the vents, then close the windows. Another tip: keep the cover over the cargo area closed. It does help, in that you don't have to cool so much space. You also may want to put a screen up over your front wind shield while parked - that helps to keep the hot sun out of the interior.

    As a another resource, you might want to try There's a section devoted to Australian drivers of CX-7's. You might want to post your question there.

  • satz24satz24 Posts: 10
    hi vince
    thanks for the reply

    The model I'm considering is the 'luxury' one, so has the Climate Control

    Guess I really wanted to check whether the AC system was any worse than any other modern passenger car?

    My Toyota Camry's AC is quite good, though I still keep windows down for a few minutes after startup. But I don't think I ever need to use 'recirc'. (it's only a manual AC system)

    What about the issue of warm air coming through the vents (when the AC is not on)?


  • carlitos92carlitos92 Posts: 458
    There have been posts about that already around here, but in a nutshell, yes, it's true: The air that comes in the vents when the compressor is OFF seems to be 10 degrees F higher than outside air. So, for me, it has to be at least 60 or below outside to turn off the AC.

    You'll need recirc on the CX-7: I live in Texas, where it gets hot and my black leather soaks in heat through the huge windshield. A screen helps considerably, but the CX-7's system is pretty well taxed and underperforms other systems I've owned. I'm not giving up on it yet... but can understand why they may be so conservative with the recirc mode in the auto climate units...

  • koroshiyakoroshiya Posts: 2
    I have had the same AC issues that most of the posters have been frustrated with.

    I finally went to my dealer and FINALLY resolved it. After they upgraded all the software in my car, it is now super cool even when it is 90 degrees F/ 33C outside.

    The service manager said many of the earlier batches of the CX7 had old software revisions which likely did not control the AC temperatures properly.

    I have also noticed slight improvements on the automatic gear shifting responses.
  • vbbuiltvbbuilt Posts: 498
    "After they upgraded all the software in my car, it is now super cool even when it is 90 degrees F/ 33C outside."


    Do you happen to have the TSB number for that problem with the A/C? I just spoke with my service guy and he says he not aware of any "software upgrade" that regulates the A/C.

    Thanks, Vince.
  • ncb81ncb81 Posts: 7
    I want the TSB number also. I just bought mine last week and the A/C is weak. Vince where do you bring your car for service in NOVA?

  • vbbuiltvbbuilt Posts: 498
    Brown's Mazda in Fairfax. Excellent service. Incidentally, I had the car checked and they did say the climate controll assembly was the culprit and is a warranty repair under TSB 07-004/06. Link to TSB:

  • satz24satz24 Posts: 10
    Hi Vince

    glad to see the AC issues were rectified. I read thru the TSB and it seems to say that only cars built before Oct 06 were affected.

    Was your's built before then or after?


  • vbbuiltvbbuilt Posts: 498
    I've had my CX-7 since June 06, so it qualifies.

  • dallascx7dallascx7 Posts: 6
    I am glad to find these posts discussing the CX7 A/C

    I am worried about A/C issues especially in the back seats.
    We live in texas and my 20 month old son gets really hot if no direct air circulation hits his face and neck.

    Did anyone have a bad experience being too hot in the back seat??

    Appreciate all feedback.

  • maltbmaltb Posts: 3,572
    When I have my CX-7 loaded on a hot day in So. Cal., I run the A/C on recirc, fan speed 4 and direct the three center vents to the rear seat. So far, no complaints.

    Just forget trying to run the the A/C on fresh air mode because the turbo seems to heat the cowl to a point where the A/C can barely overcome it.
  • astegmanastegman Posts: 171
    I'll put in my two cents to add that I've had no complaints from my 10 year old son about the A/C reaching the rear. As mentioned, I'll point some of the vents back there and it does the trick. It's been in the 90's here in Connecticut for several days now and the car has been cool and comfortable. We had no problems last summer either, even on vacation, when the car sat in 90+ degree heat all day. It cooled off quickly, front and back.

    The vent on the driver's side is rather weak in my car but I suspect that's just my particular car. I'll mention it the next time I have the car at the dealer for an oil change.

    Still, Mazda should've provided vents in the back. I think it's chintzy that they didn't.
  • dallascx7dallascx7 Posts: 6
    Thanks for the help

    Yes you can say that again (Chintzy that they didn't put vents in the back). My friend has a dodge magnum and it is smaller then the CX7 and it has back A/C with controls too!!

    A local dealer is offering $5500 off any CX7 2007, and they have attractive lease packages for 24 & 36 month (179/m for sport & 239/m grand touring) you can't beat that... they are trying to get rid of their 2007's most probably. So I am going to test drive one tomorrow and maybe lease it...will add DVD screens in each head rest & probably add chrome wheels too...
  • ridrridr Posts: 6
    Glad to read that there is a solution for the weak A/C. Is there anyone who has been able to get warm(er) vent air issue solved? While you're not running the A/C the air from the air vents is considerably warmer than the outside air. Especially when you drive slow or come to a stop. I'll be going to my dealer soon for the A/C problem and mention it too but maybe there is a known solution or TSB.
  • Does anyone know of a fix for warm air being blown in when the a/c is OFF? My problem is the ambient air is warmer than the air outside so I'm forced to use the a/c whether I want to or not.
  • cbcatzcbcatz Posts: 3
    Hello, we bought our CX7 Nov/06 and really love almost everything about it but the AC/warm air vent issue, which we have had it in to Mazda dealer about 4 to 5 times and have complained directly to Mazda twice. The service manager at the dealership called after I talked to Mazda last time and asked us to bring it in one more time.
    We have the same Issue that everybody here has, the vent throws out air much warmer then the outside air, in fact even when its 55 degrees outside the vent air feels like the heater is on a low heat setting. The only way around this is to open your windows up or throw on the air conditioner. The issue I believe is this; the turbo motor warms up the motor and vent tubes so much that the air conditioner has a hard time being efficient (its not). It's especially bad after you drive the car, go in a store, and come back out and start driving again. The first few times in for service they told us there's no problem, but we persisted that there is. I read here about climate control module and our car was old enough to have that issue. They replaced it and still no better. Once, we got back in the car after it sat for about a half hour and we drove it to our next destination 11 minutes away and found that the warm air through the vents was warm the whole 11 minutes long only just starting to get a little less warm. The temp outside was cold enough that you had to keep the windows closed (maybe 55 -60). A $30,000 vehicle should not have a defect as big as this one is. Maybe if we all call Mazda USA and complain, something may get done.

    We will let the dealership look at it one more time but I don't have much faith as I believe this to a design flaw of Mazda’s and they don't want to admit it or recall it.

    Thanks, Carey C.
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