T2000 Sleeper HVAC Actuator

Under the bunk inside the compartment for the sleeper HVAC, on top of the unit exists an actuator that when energized (by the user turning the temp knob) it moves the flap inside the air manifold to change the temperature mix.

Well, that part stopped working. It has a wiring harness with 2 red and 1 white wire. Probed the wires while moving the thermostat knob, but didn't get a "hot wire" during the exercise.

Is there an easy way to test the actuator? Should one of those wires always be hot?

Just trying to narrow it down and don't want to buy a new actuator if I don't have to.

 

What valve and what will leak? I'm talking about the electric motor that moves the flap in the air-mixture box, allowing the sleeper HVAC rheostat to proportionally open and close the gate inside that box for varying temp.

Sorry I don't know the actual names of these parts, so I'm just guessing on the HVAC stuff.

 

I tossed it in the trash after I tore it apart to learn why it failed, so no pics, but it's about 4 inches diameter, 2 inches thick, asymmetrical, has two screws to hold it down, and one lug hole that sleeves a lug on the big plastic air duct on top of the airbox. Inside the part is an electric motor with a worm-screw style gear that turns the sleeve and moves the lug on the big airbox.

It controls the temperature in the sleeper. I was only getting hot air back there, even when I turned the rheostat to cool. So I took that motorized part off and turned that lug on the airbox by hand and voila! As I turned, the temp changed, and was proportional to the amount I turned the lug. But it didn't feel like a water valve...

 

THank you. Email sent.

 

Still waiting on the part from KW. I'll let ya know.