Where is the Blend door actuator located?

Hi,

The blend air door is responsible for adjusting the air temperature entering the cab. If you can't change the airflow direction, that likely is indicating the mode door actuator may have failed.

Here is the thing. Most vehicles use an electric actuator to move the HVAC doors. In this vehicle, movement is achieved using an engine vacuum provided via a vacuum hose between the intake manifold on the engine and the HVAC controller in the vehicle.

In most cases, if you can't change the airflow direction, there is a loss of vacuum due to a faulty hose. Also, the defroster is the position it will use if there is a problem.

Take a look at this link and let me know if it helps. Also, check under the dash for damaged vacuum hoses or disconnected ones. With the engine running, you may hear a hissing sound if there is a leak.

https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position

Let me know what you find.

Joe

See pic below.

Hi,

They should be mounted on the HVAC box. If you look behind the dash where the HVAC controller is located, do you see a vacuum harness plugged into the rear of the controller? If you do, disconnect it, and start the engine. See if there is a hose that has an engine vacuum. Not always but often, the problem is the vacuum hose from the engine.

Let me know.

Joe