knocking noise from behind the dash

2002 RENAULT MEGANE
30,000 MILES
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HOOPJACK
  • MEMBER
  • 1 POST
On starting there is a knocking noise from behind the dash that goes on for around 5 seconds. If I put the aircon setting to internal flow, the noise. On changing the aircon setting from external to internal flow the noise is significantly reduced. A garage suggested that the dashboard would have to come out - I am looking to sell the car soon and do not really want to incur any major expense at this time. Do you have any suggestions? Many thanks.
Jan 22, 2012 at 10:25 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Investigate the air blend door/actuator if its operating correctly.
Jan 22, 2012 at 10:31 AM
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