HVAC vents to blowing
Thread Starter
Senior Member
Joined: Apr 2020
Posts: 389
Likes: 82
From: North Dakota
2021 G550, BMW X5M, 2020 Toyota Supra LE
HVAC vents Not blowing
A lot of my travels are short in-town trips. However, the last 2 longer trips I have had, the HVAC system would stop blowing.
I tried cycling through the different vent locations, ionizer was off, was in “focus” mode, etc… (I promise this issue isn’t user error).
The fan blows (sounds) like normal, but no air comes out. Doesn’t matter of it is set to vent, defrost, feet, etc…
The next day the HVAC will operate as normal.
(closest dealer is 8hrs away)
Any ideas?
(rear air still blows, cabin and air filters are clean)
Is it possible it’s freezing up on long trips and thaws out the next day?
I tried cycling through the different vent locations, ionizer was off, was in “focus” mode, etc… (I promise this issue isn’t user error).
The fan blows (sounds) like normal, but no air comes out. Doesn’t matter of it is set to vent, defrost, feet, etc…
The next day the HVAC will operate as normal.
(closest dealer is 8hrs away)
Any ideas?
(rear air still blows, cabin and air filters are clean)
Is it possible it’s freezing up on long trips and thaws out the next day?
Last edited by 084runnerltd; Sep 16, 2023 at 02:32 PM.
Thread Starter
Senior Member
Joined: Apr 2020
Posts: 389
Likes: 82
From: North Dakota
2021 G550, BMW X5M, 2020 Toyota Supra LE
Junior Member
Joined: Jul 2023
Posts: 23
Likes: 21
From: SE PA, USA
G550 W463A
I have a ‘23 G550. I have noticed that my AC blower fan speed will reduce to low when my AppleCarPlay speaks to provide directions. The AC on high is loud so I suspect MB has the system pause when navigation directions are announced. Do you have your AppleCarPlay in when you experience this issue?
Super Member
Joined: Feb 2006
Posts: 771
Likes: 259
If the fan is turning but no air coming out even though the vent is open then it is the electriomechanical valve that diverts the air low to the feet or to the center vents or to the defroster getting intermittently stuck shut.
Thread Starter
Senior Member
Joined: Apr 2020
Posts: 389
Likes: 82
From: North Dakota
2021 G550, BMW X5M, 2020 Toyota Supra LE
If it was a flapper I would think if it was working in the vent mode, it would continue to work unless I changed the location of the airflow…?
Last edited by 084runnerltd; Sep 17, 2023 at 09:32 AM.
Thread Starter
Senior Member
Joined: Apr 2020
Posts: 389
Likes: 82
From: North Dakota
2021 G550, BMW X5M, 2020 Toyota Supra LE
I have a ‘23 G550. I have noticed that my AC blower fan speed will reduce to low when my AppleCarPlay speaks to provide directions. The AC on high is loud so I suspect MB has the system pause when navigation directions are announced. Do you have your AppleCarPlay in when you experience this issue?
