Clicking under passenger side dash, not blend door actuator

The actuator is located under the dashboard, usually on the passenger side. You will need to remove the lower dash board trim panel. I have attached a web link as a guide to replacing it.
How to Replace Blend Door Actuator in Under 15 Minutes

The actuator motor is on the passenger side, under glove box to the left. Pull it out and make sure the blend door moves freely, if not the dash must come out and the door be replaced or the new actuator will fail.

Probably you have a blend air door failing to operate. These are controlled by vacuum on most systems, so you could have a vacuum leak to that door actuator, or a bad actuator. he bad news is, these devices are usually located way up under the dash such that they may be very hard to access. Unless you are comfortable taking much of under dash apart, might be a job for the dealer.

I know this post is old but for those of you experiencing this clicking noise it appears from my research so far that it is the actuator that moves the blend door. A couple of people even repaired the motor assembly because it appears to slip where the motor drive connects to the worm gear. If you search sienna ac actuator you can find the videos, I belive one guy was named Froggy. My passenger is stuck on cold and the driver side makes noise when moving to cold, the driver side also seems to hesitate going to warm. It's $120 for a replacement actuator. I'm really close to changing it, you just have to make sure the door and motor arm Match positions for it to work right. The dealer seems hesitant to replace it since they are worried it may be loose foam in the blender box. The box costs $3500 to replace though since its buried in the dash, and from what I've seen researching this the actuator is a possible issue in multiple models as well as Lexus vehicles and some other brands.

Either stuck blend door or a bad blend door actuator motor. It's located under the dash. Remove the actuator and move the door by hand to see if it's binding. If it's free, then the problem is with the actuator or linkage.

Do you hear any clicking or popping noises coming from dash area when you try to change the temperature? If so, you have either a bad blend door actuator or a broken blend door. If it's just the actuator, you can find it by following the popping noise to the location. It is under the dash close to the passenger's side of the vehicle. The actuator is easy to change once you find it. If the blend door is broken, you will have to pull the dash out and remove the air plenum from inside the dash to gain access to the blend door.

no u must remove the dash.

Try turning the blower motor speeds up or down and see if this makes a difference.If it does then it is your blower motor.It is under the dash on passengers side.

there is a blend door actuator for the laredo and if is bad the air wont come out here is a pic of what it looks like and how to get to it


The single zone heater-A/C system is equipped with a single blend door actuator. The dual zone system has two blend door actuators, one for the driver side blend-air door and one for the passenger side blend-air door.

1. Disconnect and isolate the negative battery cable.
   
2. Remove the glove box from the instrument panel.
3. Remove the three screws that secure the blend door actuator to the passenger side of the HVAC air distribution housing .
4. Remove the blend door actuator from the air distribution housing and disconnect the HVAC wire harness connector from the actuator.
5. Remove the blend door actuator from the vehicle

to instal

1. Position the blend door actuator into the vehicle.
2. Install the blend door actuator onto the passenger side of the HVAC air distribution housing . If necessary, rotate the actuator slightly to align the splines on the actuator output shaft with those on the blend door cam .
3. Install the screws that secure the blend door actuator to the passenger side of the air distribution housing . Tighten the screws to 17 inch lbs. (2 Nm).
4. Connect the HVAC wire harness connector to the blend door actuator.
5. Install the glove box into the instrument panel.
6. Reconnect the negative battery cable.

The control module or actuator is most likely the cause. You can manually set it for cold air until winter. Actuator is under the dash right by the blower.