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Climate Control Issue?

30K views 54 replies 24 participants last post by  Mazda3sh1tbox  
#1 · (Edited)
Hey folks,

My 2019 Mazda 3 when having the climate control on, blows really warm air. I have it at 15.5deg C and it’s still blowing warm air and only when I put it on “Lo” it blows colder air.

is this because the temperature is set to the cabin temperature? Even if that’s the case, I find it impossible to think that 15.5Deg C should be blowing hot air. I’ve driven it for 1.5 hours and it still blows warmer air at 15.5 Deg C.

I called the service techs at my dealership and they said there’s no bulletin for that kind of issue in my car. I live in Canada if that helps.
Thanks,
 
#2 ·
I have the same problem, I am in Australia. I went to my dealer and they got it in for “repair” but apparently they couldn’t find and issue so they reported it to Mazda Co. They then said that it is most likely a software issue but so far there are no available updates.


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#3 ·
I have the same problem, I am in Australia. I went to my dealer and they got it in for “repair” but apparently they couldn’t find and issue so they reported it to Mazda Co. They then said that it is most likely a software issue but so far there are no available updates.


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Yeah this is super annoying... Does the car not blow any cool air for you? Even with AC? I’m assuming it’s pretty warm all the time in Australia? It was recently -40deg C here. It was absolutely frigged.
 
#4 ·
I have had the same problem. I am from the toronto area

took my car to the dealer and they said that the car is suppose to do that when its really cold out.

They stated it doesnt matter if you have auto climate turned on or not, if its cold outside car will blow warm air even if the temperature is set to 17, 18, 19

Load of BS but what can you do
 
#8 ·
My car feels approximately 7°F off on the automatic climate control. In previous cars I'm usually set at 68°F during Winter months. I have to keep this car at 61°F (the lowest it will go before the Low setting) to feel the same. Where it sucks is if I'm dressed really warm for work and the lowest it will go is 68°F actual. It will be 20°F outside and I'm cracking a window to not pass out from a heat stroke lol.
 
#13 ·
My issue goes away after 10 minutes then you have to re-adjust. Then it is good until the car cools down. I got the software update and still have the problem. I do have to say, the car can heat up faster than any I ever had.

I have the feeling there are some serious software problems in the climate control. It just seems like the behavior is a bit goofy and indeterminate.
 
#18 ·
The TSB is 07-006/19. It is for 2019 Mazda3s built in Japan and Mexico before June 19 2019. They say the problem is that it blows warm air for 10 minutes at startup between 16-25 c or 61 to 77F.

I had the problem for longer than 10 minutes and at temps well below the range. My first solution was to drive with the windows open even when it was well below freezing. I almost sold the car before I had the fix done 3 weeks ago. I have no complaints now.

Read the warnings in the other post and proceed with caution. Apparently if they mess up doing the repair (or apparently a few other repairs) the system can shut down and they have to get someone to help them fix it. I would go with a big dealer with a good service reputation.

Good luck and post if you have success in getting a dealer to fix it for you.
 
#20 ·
I looked over TSB 07-006/19 (https://static.nhtsa.gov/odi/tsbs/2019/MC-10165346-0001.pdf ), and the last 6 (138629) of my VIN fall above the affected vehicles (126602), but I'm definitely experiencing weirdness. I'm in Florida so I don't blast much heat, but it was 30F this morning. Didn't have the A/C compressor on, but 'Lo' with fan on first setting would blow cold/ambient, and anything above it was blowing super hot. Drive to work was only about 15 minutes, so I didn't get to test any longer.
 
#21 ·
In really warm days, like 35°C, I tried manual full blow, with the temperature set at the minimum, 18°C in my car. Nevertheless, I soon noted that Auto is much cooler, and faster.
I also noted that changing the air recirculating mode helps a lot. For instance, if the car was in the sun, the inner air is even hotter, so it helps to let external air in. This defaults to the opposite setting when turned off.
In really cold weather, I still do not know, as I bought my baby by the end of winter, and still will have to live a winter...
 
#22 ·
I've experienced the same thing in US (WA state). It's been pretty cool this winter and I usually leave the temp set at about 64, which seems like it should blow cool air, but it still pumps fairly warm air. Note, it's like 40F outside. If I set it up to about 67-70, it gets way too warm. I'm gonna bring it in to Mazda soon and see if there's anything they can do about that.
 
#27 ·
My 2019 still has this issue (albeit marginally less extreme after the TSB update). I'll probably switch dealers to get a new perspective on the problem - they seem to think it isn't a defect/problem. My biggest gripe is that air blows out the centre vents when it's set to feet only or windshield only. Intermittent problem as well. It's not always bad, but it's far worse than the auto climate system in my old 2010 '3, unfortunately.
 
#28 ·
I noticed this issue on a 2019 loaner I had a few weeks ago. On my 2018 I can leave it on AUTO, set to 70ºF (21ºC) pretty much year round and be comfortable but on the 2019, that setting felt like it was trying to convection bake the inside of the car. I had to keep it at 66ºF (19ºC) to have roughly the same effect as 70 in my car.
 
#29 ·
I stopped using AUTO in the summer because it would drive the blower to hurricane force well after the car had cooled off. I could never come up with a consistent setting. The whole climate control is flaky. Lots of odd results where I try to reproduce and I can't. Being in the business, this really feels like bad outsourced software. I don't think they will ever get it working correctly. They should release the source code on github. There's probably enough Mazda drivers in the software community that are pissed off enough to fix it for free.
 
#32 ·
"My biggest gripe is that air blows out the centre vents when it's set to feet only or windshield only. "

That is exactly the same problem I had on my 2019 mazda 3. Now when dealer tried to fix this issue and destroyed BCM in my car, they give me a loaner - Mazda 2. A/C was working great. After 10 days they switched Mazda 2 for 2019 Mazda 6 - and the same problem : hot air blows right into my head, no matter what I select.... Before that I owned 2014 Mazda 3 and 2017 Mazda 3 - both of them worked fine....
 
#33 ·
It's the same with me, luckily I haven't visited the dealer. This is where the updates come with great delay.
May be "new generation" A/C :)
My way of counteracting this is when it starts to get warm on my head or I stop ventilation or put it on Lo for a little while and then at 16.5 C
 
#34 ·
I had the TSB applied to mine and it didn't solve the issue. It is somewhat better but not 100%. One morning when it was in the 30's F it was heating the car but in the afternoon when the outside temp had risen to mid 70's the climate was trying to cool the car but not much air was coming from the vents, the defroster or the floor. I had to manually cycle through the various settings for the desired airflow from floor, defroster and finally the dash vents to make the system work. It's as if the mixing valve / flap was stuck and the computer didn't do anything to move it to correct position. Mazda should not have let this happen. Auto HVAC systems have been available long enough that this should have been second nature to them. I know this is a new model but these kinds of issues should not be happening.
 
#35 ·
I've had it for about a week and I agree. I tend to see a lot of flakiness with the whole climate control. Sometimes I can't get AUTO mode to shut off. Sometimes the blower starts at full force. My guess is they outsourced to a company that has no idea how to develop realtime software but was cheap. It happens all the time when trying to cut costs.
 
#36 · (Edited)
In search of the best winter feeling, today I did a few experiments in manual mode:

1:
275164
Not OK, same as Auto mode:
- Hot air from windshield to the head :(
-Hot air to the legs


2:
275165
Can be OK:
  • Have NOT hot air from windshield to the head :)
  • Have hot air to the legs
  • And if you close the blowers in the middle it becomes perfect :)
 
#37 ·
I noticed it this morning. 68 degrees (32 outside) was unbearable. This temp worked fine last night. I had to turn it down to 62 to make it the way I like it. I've found that once the car warms up, it is fine and I can do several stops without it going to hell. First thing in the morning is when I notice it and if I drive less than 10 minutes, it keeps ongoing after every start.

Is there a correct way to report this to Mazda to make them aware of the problem?
 
#38 ·
Just came back from my dealership. The service manager told me this is a huge issue with all newer Mazda’s with the new climate control being “semi-auto” even on manual mode.

He told me there are currently no fixes for the Canadian cars in terms of being too hot. I did notice after driving 10-15 mins, the temps eventually cool down...

This sucks but I guess I’ll have to live with it.
 
#47 ·
Has anyone got the climate control issue figured out?

theres no way a car should be blowing hot air at 16,17 18, 19 degrees. Especially in manual mode (when its not in auto mode)

dealer said its normal, but i highly doubt that. I tested 2 other New cars ( civic and q5) and they were both blowing cold air at those temperatures.
 
#48 ·
I was told that even in manual mode, the climate control goes for cabin air temperature, not blowing temperature.
Like they said, after a while and car recognizes that it’s 15.5 or 16 or whatever, it then starts blowing “cooler” air. It’s annoying but I guess it is what it is.

I’m just hoping it’s not bad during the summer days. I never had to actually turn on AC yet since it’s in the negatives all the time where I’m at.