[First post - climate control query]

I have had my Superb 170CR 4x4 for a week now. Ex Skoda car with 6.5k on the clock. I am very impressed with it so far, build quality, ride and economy. Hopefully I am not tempting fate by saying its probably the best car I have owned.

I do have a question around the Climate control. I have noticed a groaning / droning noise from the central air vents and to the left in the area of the top of the glove box. This is noticeable when the AC is on but is intermittent and last only about a minute or two before clearing itself.

I have been able to make it happen by turning the temperature down to minimum and then back up to the low 20's.

I have searched on here and seen similar posts around Climate noise but not this specific issue. My last car did have a noisy system with a number of flaps and motors that could be heard in the cabin.

Is the Superb system noisy and is this a feature of the car?

Thanks

John