HVAC Airflow Issue (1 Viewer)

[Muspos]

Hello,

I have a 2010 with almost 200k on the clock that has me stumped. The airflow from the front HVAC vents has become less and less. The airflow is nice and cool but it just isn't blowing with much volume or velocity. With ambient temps at 110 + degrees, it is not much fun to drive the black Cruiser right now!

I had this problem with my Avalon, researched the problem, and replaced the front blower fan, problem solved. So being the smart person I assumed knew what the problem was and that I had the same issue with the Cruiser. I replaced the blower fan and it made only a minor improvement. The rear blows at least 3 times as much as the front does, so at least the kids stay cool.

Any advice or assistance would be greatly appreciated!

 

[TeCKis300]

What's the state of the cabin filters? Is the airflow the same between recirculating and fresh air?

 

[Sandroad]

Check the cabin filter, with the system in RECIRC.

 

[Sandroad]

Later model LCs have had a problem with the A/C amplifier that fit your symptoms.


Some 2017-2019 Toyota Land Cruiser vehicles may exhibit one or more of the following HVAC conditions:

• Uneven temperature or air flow between the vents
• Little or no air flow from the vents
• Improper MODE control function

Additionally, some vehicles may store one or more of the following DTCs:

B1441 (air mix damper control servo motor circuit (front right lower air mix)

B1442 (air inlet damper control servo motor circuit)

B1443 (air outlet damper control servo motor circuit)

B1445 (passenger side cool air bypass damper control)

B1446 (air mix damper control servo motor circuit...driver side lower air mix)

B1447 (rear air mix damper control servo motor circuit...driver side lower air mix)

B1448 (passenger side face servo motor circuit)

B1449 (rear air outlet damper control servo motor circuit)

B1457 (driver side air outlet damper control servo motor circuit)

B1458 (passenger side air outlet damper control servo motor circuit)

B1486 (driver side air outlet damper control servo motor circuit)

B1488 (rear air mix damper control servo motor circuit...front passenger side)

Confirm that one or more of the previously noted conditions are present. If so, check for DTCs. If any of the DTCs listed above are present, flash reprogram the air conditioning amplifier assembly with the latest software.

 

[ntsaint]

Subscribed. Same issue.

you may also want to make sure your recirc door isn’t broken. It may be stuck in ‘outside air’ mode. Mine is broken so i have to wedge it open, always in recirc. It cools then, but the fan and air volume speed don’t seem to be appropriately high.