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Anyone resolve the mystery of your A/C fan turning off randomly and then turning back on right after

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Old 06-03-2005, 02:30 PM
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Default Anyone resolve the mystery of your A/C fan turning off randomly and then turning back on right after

it just turned off? Looks controlled, because it abruptly shuts the fan off, then gradually raises the fan speed back to its original position.

This occurs to me while on "Auto" mode. It seems random and doesn't depend on temperature setting or outside air temperature.

I know others have had this issue before. Maybe it's part of the system or maybe it's a glitch. Any answers from anyone?
Old 06-03-2005, 02:50 PM
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Default it seems to happen within minutes of starting my car and then

its ok for the rest of the trip.
Old 06-03-2005, 03:42 PM
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Me too! I can't keep track of when it happens.
Old 06-03-2005, 03:43 PM
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How about the yellow head light indicator in the DIS that goes on and off in a blink?
Old 06-03-2005, 04:14 PM
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Default That would be the dynamic headlight warning. A old well known problem

I have had it 13 times . It comes from a defective sensor in the inside rear view mirror. HOWEVER, if you start the car 40 times before you take it in for service, there will no longer be a code for the tech to detect. NO detect, no replacement. Mirror needs replacement. Issue is not anoying enough to worry about it.
Old 06-03-2005, 04:56 PM
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Default I used to get that indicator too, and it used to only occur when...

The headlight position is set to "Auto" and the front of the car (particularly the windshield/mirror area) was subjected to bright, direct sunlight.

I turned off the "Auto" mode and haven't gotten that error since.
Old 06-03-2005, 04:57 PM
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Yeah, this would be a PITA to replicate to dealers because of its random nature...
Old 06-03-2005, 05:22 PM
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Default My A4 did this....

the dealer never could figure it out so they replaced the whole thing. That fixed it. The fan speed used to change randomly also. No problems with my S4.
Old 06-03-2005, 06:33 PM
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I Have the same problem with my S4 and A4 before that.
Old 06-03-2005, 08:13 PM
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Default I had this problem too. Dealer saw a code....

thrown for an AC problem and decided to change out the whole unit. No problems since....


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