Cooling Fan

1997 AUDI CABRIOLET
110,000 MILES
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BACCO
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  • 1 POST
When car is idling, even if cool outside,cooling fan will engage with an increase in RPM, about every 3 minutes. Is this normal for this car or a sign of a future problem. Is this something unique to this engine that it revs up like this?
Nov 21, 2011 at 5:01 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Have the coolant temperature sensor checked-when the fan kicks in the idle has to increase to compensate for the additional electrical load-dunno if yours is normal-could be
Nov 21, 2011 at 5:15 PM
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WRENCHTECH
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  • 20,761 POSTS
  • ASE Certified Mechanic
It's probably the A/C compressor cycling on and off with the defroster. The computer automatically increases the idle for the extra load of the compressor.
Nov 21, 2011 at 5:23 PM
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