x167, warm air coming out after engine warmed up
Thread Starter
Newbie
Joined: Oct 2024
Posts: 4
Likes: 0
From: nj
x167
x167, warm air coming out after engine warmed up
Hi, i have a gls 580(x167) that is having strange issue. with AC off(assume ac has been off for a while and every bit coldness in coolant is out already), it never blows cold or outside temperature air regardless of outside temperature, it always blows warm air. as if car doesn't know to take advantage of outside colder air. i can't believe this is normal behavior of a 100k+ car.
method to recreate it:
assume outside temperature is 60 degree.
inside temperature is a little uncomfortably hot.
with AC off, turn on car, drive until engine is completely warmed up(thermostat is open, coolant is circulating),
with temperature set to "LOW" the air coming out from vent is warm(this should be outside chilling air, but obviously not).
let it sit a couple of minutes still warm. an hour later, still warm.
there are couple of times, i was sweating inside while outside temperature is chilling 60 degree. i have to open car window couple of times to let outside chill air coming in.
repair so far:
went to dealership to let me check the car, told them maybe some shutter actuator is stuck, they checked, everything is normal
and dealership told me i m the crazy one, they never have this problem and they cannot recreate this issue.
i replaced the outside air quality sensor because this showed up in scanning.
figured maybe car doesn't know outside temperature so it just go with air going through radiator(coolant).
well, didn't solve the issue.
question:
does any one run into this similar issues? is there any place i can check, any parts to swap?
i don't want to turn on AC in cold winter.
method to recreate it:
assume outside temperature is 60 degree.
inside temperature is a little uncomfortably hot.
with AC off, turn on car, drive until engine is completely warmed up(thermostat is open, coolant is circulating),
with temperature set to "LOW" the air coming out from vent is warm(this should be outside chilling air, but obviously not).
let it sit a couple of minutes still warm. an hour later, still warm.
there are couple of times, i was sweating inside while outside temperature is chilling 60 degree. i have to open car window couple of times to let outside chill air coming in.
repair so far:
went to dealership to let me check the car, told them maybe some shutter actuator is stuck, they checked, everything is normal
and dealership told me i m the crazy one, they never have this problem and they cannot recreate this issue.
i replaced the outside air quality sensor because this showed up in scanning.
figured maybe car doesn't know outside temperature so it just go with air going through radiator(coolant).
well, didn't solve the issue.
question:
does any one run into this similar issues? is there any place i can check, any parts to swap?
i don't want to turn on AC in cold winter.
Last edited by ceacar; Oct 23, 2024 at 03:57 PM.
MBWorld Fanatic!
Joined: May 2023
Posts: 1,122
Likes: 310
'23 GLS450
I've owned multiple Mercedes and none of them are able to do what you say!
In my G01 X3 on the other hand, I can bring in cold or hot air as I like via a separate setting that is not possible in a Mercedes!
In my G01 X3 on the other hand, I can bring in cold or hot air as I like via a separate setting that is not possible in a Mercedes!
Thread Starter
Newbie
Joined: Oct 2024
Posts: 4
Likes: 0
From: nj
x167
it is impossible. it would be career suicide for mercedes to do it. gotta be something is not running right.
maybe i should try more dealer?
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Joined: Oct 2009
Posts: 6,987
Likes: 2,187
From: Colorado
'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
I think you'll find that the car is introducing fresh air into the cabin at all times. In fact, the only way to prevent it is to use the Recirc button.
The general purpose is to prevent humidity buildup and mold from forming in the system.
In the winter, air conditioning has always been used for maximum defrost, even while blowing hot.
As far as energy usage goes, your air conditioning compressor is driven by the 48 volt system, so it's impact is minimal.
The general purpose is to prevent humidity buildup and mold from forming in the system.
In the winter, air conditioning has always been used for maximum defrost, even while blowing hot.
As far as energy usage goes, your air conditioning compressor is driven by the 48 volt system, so it's impact is minimal.
MBWorld God!
Joined: Dec 2019
Posts: 32,224
Likes: 6,281
I think you'll find that the car is introducing fresh air into the cabin at all times. In fact, the only way to prevent it is to use the Recirc button.
The general purpose is to prevent humidity buildup and mold from forming in the system.
In the winter, air conditioning has always been used for maximum defrost, even while blowing hot.
As far as energy usage goes, your air conditioning compressor is driven by the 48 volt system, so it's impact is minimal.
The general purpose is to prevent humidity buildup and mold from forming in the system.
In the winter, air conditioning has always been used for maximum defrost, even while blowing hot.
As far as energy usage goes, your air conditioning compressor is driven by the 48 volt system, so it's impact is minimal.
MBWorld Fanatic!
Joined: Dec 2011
Posts: 1,693
Likes: 489
From: Spain UTC/GMT +2 hours
W213 All-terrain
Hi, i have a gls 580(x167) that is having strange issue. with AC off(assume ac has been off for a while and every bit coldness in coolant is out already), it never blows cold or outside temperature air regardless of outside temperature, it always blows warm air. as if car doesn't know to take advantage of outside colder air. i can't believe this is normal behavior of a 100k+ car.
method to recreate it:
assume outside temperature is 60 degree.
inside temperature is a little uncomfortably hot.
with AC off, turn on car, drive until engine is completely warmed up(thermostat is open, coolant is circulating),
with temperature set to "LOW" the air coming out from vent is warm(this should be outside chilling air, but obviously not).
let it sit a couple of minutes still warm. an hour later, still warm.
there are couple of times, i was sweating inside while outside temperature is chilling 60 degree. i have to open car window couple of times to let outside chill air coming in.
repair so far:
went to dealership to let me check the car, told them maybe some shutter actuator is stuck, they checked, everything is normal
and dealership told me i m the crazy one, they never have this problem and they cannot recreate this issue.
i replaced the outside air quality sensor because this showed up in scanning.
figured maybe car doesn't know outside temperature so it just go with air going through radiator(coolant).
well, didn't solve the issue.
question:
does any one run into this similar issues? is there any place i can check, any parts to swap?
i don't want to turn on AC in cold winter.
method to recreate it:
assume outside temperature is 60 degree.
inside temperature is a little uncomfortably hot.
with AC off, turn on car, drive until engine is completely warmed up(thermostat is open, coolant is circulating),
with temperature set to "LOW" the air coming out from vent is warm(this should be outside chilling air, but obviously not).
let it sit a couple of minutes still warm. an hour later, still warm.
there are couple of times, i was sweating inside while outside temperature is chilling 60 degree. i have to open car window couple of times to let outside chill air coming in.
repair so far:
went to dealership to let me check the car, told them maybe some shutter actuator is stuck, they checked, everything is normal
and dealership told me i m the crazy one, they never have this problem and they cannot recreate this issue.
i replaced the outside air quality sensor because this showed up in scanning.
figured maybe car doesn't know outside temperature so it just go with air going through radiator(coolant).
well, didn't solve the issue.
question:
does any one run into this similar issues? is there any place i can check, any parts to swap?
i don't want to turn on AC in cold winter.
Maybe the air try to start cold but because the evaporator and the dashboard is too hot, the blown cold air becomes hot on the way out...
Newbie
Joined: Apr 2024
Posts: 2
Likes: 0
X167
Have had similar issue with my b pillar vent blowing hot air whilst rest of vents blow cold air. It was a shutter actuator below seat that was faulty and jammed. Workshop had to (from memory) remove entire b pillar trunking and seat to replace. Worked properly after. Warranty job.
Super Member
Joined: Jun 2015
Posts: 630
Likes: 188
C450, GLS 63 and a few other things
I can't help with your "issue" (sorry) that I think is as-designed, but what's the concern on running the AC in the winter?
The compressor will shut itself off if very cold, otherwise the AC will cylce itself to help remove the moisture form the air and prevent fogging and such. No reason to shut off the AC in the winter, and the air will be better off if you don't.
The compressor will shut itself off if very cold, otherwise the AC will cylce itself to help remove the moisture form the air and prevent fogging and such. No reason to shut off the AC in the winter, and the air will be better off if you don't.
