Re: Jeep makes popping noise?
The blend door is in the center section of the HVAC box. Generally speaking, the actuator is the root cause of the problem, causing the door to come up against the stop, with the motor forcing still, and breaking the shaft of the door. Some of the doors are operated by the actuator, which has a gear that is plastic. If it is the FRESH AIR door, that is behind the glove box door. Remove the door and inspect the drive actuator. You shoild see a plastic gear on the drive side of the actuator. Actuate the door via the control head, and watch the movement of the gear. If the gear pops, that is the cause of the noise. Under warranty, not a major issue. If cash job, they will bill the cost of the Fresh Air Door and Housing, because the gear is not available separately.