I hear 3 or 4 clicking noises when I turn on my A/C

Good afternoon,

This sounds like the blend door actuator motor. Common noise when the gears are slipping.

Roy

REMOVAL PROCEDURE


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1. Remove the I/P carrier.See: Instrument Panel, Gauges and Warning Indicators > Testing and Inspection
2. Remove the air temperature actuator-left (1) retaining screws.
3. Disconnect the air temperature actuator-left electrical connector.
4. Remove the air temperature actuator-left.

INSTALLATION PROCEDURE


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1. Install the air temperature actuator-left (1)

NOTE: Refer to Fastener Notice in Service Precautions.

2. Install the air temperature actuator-left retaining screws.

Tighten
Tighten the screws to 1.9 N.m (17 lb in).

3. Connect the air temperature actuator-left electrical connector.
4. Install the I/P carrier. See: Instrument Panel, Gauges and Warning Indicators > Testing and Inspection
5. Recalibrate the air temperature actuator on vehicles equipped with automatic climate control (C68). Refer to Re-Calibrating Actuators (Primary) or Re-Calibrating Actuators (Auxiliary HVAC).

For a description of the RPO Code(s) shown in this article or any of the images therein, refer to the RPO Code List found at Vehicle/Application ID". See: Vehicle > Components > RPO Codes

If I do nothing about the noise, am I doing damage? Will it eventually break?

Hello, I'm Danny.

Yes, damage is being caused to the plastic gears. If the problem isn't fixed over time when the gears are stripped the blend door will stay closed and not be operational. You will then have no control out of the vents when using the heat or air conditioning systems. We suggest fixing this as soon as possible to prevent further damage and cost to the hvac system. Hope this this helps and thanks again for using 2CarPros.

As Danny said the system will not work correctly. you may end up stuck on either full heat or air conditioning.

Roy