Thanks for the reply.

Next time this occurs if the test I mentioned above stops the noise then the concern you have is broken blend door shaft or a blend door actuator that controls the blend door on the rear HVAC unit. See the image below and let me know at that time if you plan to address this yourself, and I will assist.

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Thanks for asking your question. Your helping me pay my bills, and I

am hopefully helping you lower your repair bill or at least informing

you of the repair needed prior to getting it fixed.

You are about to see our rating system. The rating is how I am paid.

No rating and I am not paid. Neutral or Negative rating and I am not paid.

I am only paid once you rate OK or GOOD or EXCELLENT SERVICE.

For some customers there is not a rating, just press ACCEPT then.

Please if you need to follow up, only press REPLY TO EXPERT.

You can also reply after rating if needed. I also ask that you do reply

and state which service you wanted to select because there has been

a problem with the rating system.

Thanks Chris