4 Zone Climate Question
 

I just got an 2011 X5 and was wandering if something is wrong with my rear climate controls. If I set temperature for driver and passenger at 60°F and set rear controls to 84°F the rears still blow cold air (maybe slightly warmer than front, but definitely not anywhere near 84°F). I do have the wheels in the back turned to red for heat. Also what I noticed is if I increase the fan speed from the rear controls the front also starts blowing harder. I was under impression that 4 zones means you could set any temperature you want in any of the 4 zones and front and rear fan speeds are completely independent. Is it not working the way it should? Will CPO warranty cover it?

Thanks

isn't there a temp dial you need to set towards warm? its probably on cold which will blow cool air to achieve the temp as opposed to hot air.

I did set the temp dial wheel in the back to warm (red setting), but not much changed. In the front I can have 60 degrees on one side and 84 on the other and it works fine, but the rear seems to follow the front.

In the idrive menu look for:

1. "Settings"
2. "Climate"
3. "Rear climate control"
4. Select the desired settings.

there are two settings, at least there is on my 2012.

Yes, I do have 2 options for rear climate control on the iDrive. One of them is to turn the rear climate off, and the other is to sync it to the front controls. I have both options unchecked. I'd like to have independent rear climate control so my daughter can have either warm or cold air going to her seat.

jdg857, can you please check what your 2012 does if you set the front to cold (with AC on) and the rear to hot.

Thanks

Reminds me of mine but in the front. Mine is set to like 65 with AC and my fiancee sets her to like 83 lol

I was on the road today so I did set the front to cool (72 degrees F) and the rear to warm (84 degrees F) with the rear air outlets switched to warm air, and while it was warmer out of the rear seat outlets it wasn't hot, but the ambient air was around 86 degrees F, so there may not have been a need for much heat. I then turned the front units up to 84 and the rear air was warmer. When I put the front down to 60, the rear units stayed warmer than before. I don't know if this helps, but it seems the rear air conditioning units are somewhat dependent on the front air temperature settings. It took several minutes after each change for the air temperature to stabilize.

I adjusted the fan speed on the rear unit and it had no effect on the front fan speed, so you may have an issue there.

Thank you for checking. I'll call the dealer tomorrow.



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I have the same thing going on with mine...Best I can offer is that it has to do with the outside ambient temperature. The warmer it is outside regardless of the temperature setting the air is going to be cooler. This morning, it was about 49 and my rear climate control was cranking out tons of warm air from the side set to 84 and the side set to 65 was cooler. My '12 X5D (with all of the things wrong with that thing) Functioned exactly the same way.

The rear AC is not a standalone unit, and i dont believe that the front can be set on cooling (AC ON) and rear on heat, or vice versa. You can have that with let's say 3rd row seats when there is a standalone HVAC unit in the trunk with separate heater core and evaporator.

Section 08 Climate Control from the following location describes the system. The system is more sophisticated than I originally thought.
Index of /pdf/e70

^^^ This, with a slight correction.

There is only 1 Evaporator and 1 heater core so you can't have A/C in the back and Heat in the front or vice versa (just like you can't have the driver with the heater and the passenger with the A/C).

I think all the 3rd row seat has is a heating element which is electric. I don't think it has it's own evaporator.

Different temperature settings adjust the amount of air blown, not the temperature of the air.

+1. Basically the definition of a "zoned" HVAC system. Air quantity is adjusted, not temperature. The increase (or lack thereof) of conditioned air is what changes the temperature of the environment based on the selected setting. So, if back seat is calling for more air than front, the main fan speed will ramp up with no additional air exiting the front vents (i.e. sending it to the back).

Operation of OP systems sounds normal.