Technical Annoying noise from dashboard vents

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Technical Annoying noise from dashboard vents

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Jan 1, 2007
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Bangor, County Down
I wonder if anyone else has noticed a constant creaking/rattling noise coming from the dashboard heater vents when they are warm. It seems to come from the vents across the whole windscreen and the face level vents in the centre of the dash. It's almost as if a type of hard plastic is constantly moving against a sightly softer material.
 
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Mine does the same but only as its warming up. Once up to temperature and all the plastic has expanded, it stops.
 
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