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I switched out the blend door actuator under the drivers side (it controls the different modes/vents). The old blend door actuator was making a clicking noise, so I decided to install a new part and when I did clicking noise was gone, but now I couldn’t switch to different vents/modes. When I first started it up the actuator went through all the different vents/mode, but then when it got to defrost it just stayed there. I thought the actuator was bad, so I got another one, but the same thing happened again. What could be the problem?