[m3cragg]

has anyone had issues with the rear climate controls, no matter what the temp is set at the rear passenger side always blows hot air.

[TK421BMW]

Mine is the opposite. One side only blows cold air. Dealer tried a couple times to fix, now waiting for a part from Germany for a second time. First one arrived damaged. Takes dealer 6 hours to get to part and another 6 to put back together, so be prepared to not have your X5 for a few days. Also takes 2-4 weeks to get part. Sigh....

[ivieisme]

Originally Posted by TK421BMW

Mine is the opposite. One side only blows cold air. Dealer tried a couple times to fix, now waiting for a part from Germany for a second time. First one arrived damaged. Takes dealer 6 hours to get to part and another 6 to put back together, so be prepared to not have your X5 for a few days. Also takes 2-4 weeks to get part. Sigh....

Did you ever get the name of the part needed? I have the same problem and would like to save time getting mine fixed if possible.

[ivieisme]

Originally Posted by m3cragg

has anyone had issues with the rear climate controls, no matter what the temp is set at the rear passenger side always blows hot air.

Yup. And I'm in Florida. It's HOT and I can't fully turn it off.

[TK421BMW]

Sorry, not sure that part #. Dealer should know. Guess it's a known issue.

[TK421BMW]

Update: 2nd part arrived (rear heater box assembly) to replace the first one which arrived broken... this one is broken as well. Looks like BMW Germany is unable to ship a part with enough padding. Time to wait another 3 weeks.

[Davidf34ua]

Friends, tell me, how did you solve this problem?

[Chas8283]

Wow. Don’t have an answer but so happy to see this thread! Last X5 did this fairly regularly the whole time we had it. Would notice either the rush of air as the front tried to cool and the rear tried to heat or would notice the poor dog panting back there. Didn’t matter if we controlled rear temp from front or rear display or cycled on and off. Dealer tried a software upgrade but it made no difference. Have had or new ‘22 for a few weeks and on the drive home last night realized it was doing the same thing: front blasting cool air trying to keep the temp down, rear full hot. Will be following this thread.

[Davidf34ua]

Originally Posted by Chas8283

Wow. Don’t have an answer but so happy to see this thread! Last X5 did this fairly regularly the whole time we had it. Would notice either the rush of air as the front tried to cool and the rear tried to heat or would notice the poor dog panting back there. Didn’t matter if we controlled rear temp from front or rear display or cycled on and off. Dealer tried a software upgrade but it made no difference. Have had or new ‘22 for a few weeks and on the drive home last night realized it was doing the same thing: front blasting cool air trying to keep the temp down, rear full hot. Will be following this thread.

I am shocked by this situation, because for half a day I tested and monitored the temperature, and in the rear of the cabin they reached 60 degrees, while the front was 28 degrees. I dismantled the glove box on the right, removed the temperature sensor from the air duct, and the sensor data changed, ie the problem is not in the sensors. I replaced the rear control panel. also the situation has not changed. it seems that either the control unit IHKA has an incorrect algorithm, or still faulty dampers of the heating unit.

[Davidf34ua]

If you set the LOW temperature on the rear panel, the mixing damper closes completely, respectively, the air is cold. as soon as you increase the temperature by 1 degree, the mixing valve immediately opens by 100 percent, which is not correct. at the moment the air conditioning system is working properly, the problem is sporadic, and not on a permanent basis.

[hkleyman]

Originally Posted by Davidf34ua

If you set the LOW temperature on the rear panel, the mixing damper closes completely, respectively, the air is cold. as soon as you increase the temperature by 1 degree, the mixing valve immediately opens by 100 percent, which is not correct. at the moment the air conditioning system is working properly, the problem is sporadic, and not on a permanent basis.

I had a similar issue on my MY19 G05 where the rear left vents (both B pillar and center console left side) were blowing the opposite of whatever the zone was actually set to.

Brought it in and they said they used some tool to reattach the flap to the servo motor. Unsure if it broke in transit or was the result of a miss at Spartanburg.

[fstezaws]

I'm having the exact same problem.

Twice in the last week, my two kids in the back are complaining it's blowing hot. I leave the driver/passenger front on Auto, light fan speed, and 72°. Right now that's about ambient outdoors so it's not working hard.

I have the rear controls deactivated so the kids are not messing with it, and when I go and check the settings, they are at the same settings—72°, auto, light.

When I put my hand back there to feel the temp, it's boiling hot, like as hot as I would expect a car to blow air. Both the center vents as well as the side door vents.

72° setting when the ambient temp is also the same seems quite odd why it would be trying to heat the air so much.

[Davidf34ua]

Does anyone have a solution to this problem?

[bceye]

Have the same issue on MY'22. Anyone resolved it?

[MDBMW76]

Bumping this up as I have the exact same issue with a 22 X5M and looking to see if there are any solutions...ice cold air upfront and blazing heat in the back with the sync mode on. I traded in my 19 X5 at the end of last summer and noticed that my new one wasn't cooling as well as my old one. Took it in and they found no faults and all that blah blah blah. Heat worked just like my old one did throughout the winter months but now with the temp rising, I get very little air out of the dash vents (even when I adjust the intensity to level 5, which I never needed to do on the 19. I usually kept it at either level 1 or 2 if it was really hot out and it did it's magic in auto mode. The ratio of fan noise in the dash to the level of air output seems to be off so I don't know if something is getting blocked or frozen when cooling. My X5 loaner had more blow on the max ac setting than mine and in line with my old one -- like a hurricane versus a breeze. The other thing I've noticed is what little air I do get out from the dash vents is that it is super cold. A good thing but it's tripping up something to cause the heat to come out of the back vents.

[p2rdik]

Originally Posted by MDBMW76

Bumping this up as I have the exact same issue with a 22 X5M and looking to see if there are any solutions...ice cold air upfront and blazing heat in the back with the sync mode on. I traded in my 19 X5 at the end of last summer and noticed that my new one wasn't cooling as well as my old one. Took it in and they found no faults and all that blah blah blah. Heat worked just like my old one did throughout the winter months but now with the temp rising, I get very little air out of the dash vents (even when I adjust the intensity to level 5, which I never needed to do on the 19. I usually kept it at either level 1 or 2 if it was really hot out and it did it's magic in auto mode. The ratio of fan noise in the dash to the level of air output seems to be off so I don't know if something is getting blocked or frozen when cooling. My X5 loaner had more blow on the max ac setting than mine and in line with my old one -- like a hurricane versus a breeze. The other thing I've noticed is what little air I do get out from the dash vents is that it is super cold. A good thing but it's tripping up something to cause the heat to come out of the back vents.

Did you have your car fixed?

I have a european 2021 X5 30d and have same issues after winter. Got very hot in car and checked...
Rear ac blowing hot as hell. outside 16C and it blows 60C+ no matter setting you put in.
Only max AC will be cooling for rear.
Same time front blows cold (10C) but get also very little air from vents even if put on max AC

Also i had problems with windscreen icing if outside temp was very low - specially passanger side lower corner. I needed to use max heating for a while. It may indicate same error that very low air get out of windscreen vents.

Have my appointment for service next week, we'll see...

[Leotno]

I had this issue on my 2019 after multiple dealership visits. They found that the rear temperature sensor was installed improperly. I believe they said the wires were inverted or something. They replaced the unit controls in the rear and it solved the issue.

I can look for my service record for that repair if it helps anyone else.

[richads]

Hi there,
I have the same issue on my X6 G06 M50i from 2023.

As the car has only a few days, i've sent it back to my dealer yesterday. They called me and said that, for the moment, they didn't found the origin of the issue. They first thought of a faulty flap then a software issue but still nothing.

They are now waiting for some news from BMW's HQ.

Can someone tell me how they resolved their issue?

Thx!

[medialook]

For me slightly different issue but similar at the same time.... low / no power blow from the front vents. And often warm air at the back. Initially fan motor replaced. Didn't solve the problem. Now my 10 months old X5 is again at the dealer having the heather box replaced. Whole dash + center console had to be taken off in order to access the heather box. It does look horrible but I hope it's correct diagnosis. If not I will be trying to return / swap the car by bmw uk as this is the third attempt to repair it in the £90k car.

[ikheetleon]

I’m having this issue as well on my ‘20 45e. Can it be a software issue? I have this car for more than 3 year and just recent couple of months I’ve noticed this issue. Any fixes from dealers? Maybe a DIY?

[matowi]

I had the same issue on my 740. No matter the temperature setting, rear vents blowed hot air

The authorized BMW service center I went to fixed the issue by replacing the cabin air filters. Don't ask me how this worked, but it did. I've been happily driving my car with no A/C issues since

[ikheetleon]

Originally Posted by Davidf34ua

If you set the LOW temperature on the rear panel, the mixing damper closes completely, respectively, the air is cold. as soon as you increase the temperature by 1 degree, the mixing valve immediately opens by 100 percent, which is not correct. at the moment the air conditioning system is working properly, the problem is sporadic, and not on a permanent basis.

I have the exact same behavor as you described. Setting the rear temp to the lowest value, prevents the unit from blowing hot air. When adding 1 degree, it goes from cold to hot. Did you ever get it fixed? Seems like a broken or misaligned mixing damper. But where is it located? Would it be possible to fix it myself?