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Interior fan rattle

ericinca
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ericinca Member

ericinca

Posted
Posted

I have a 99 Boxster and have noticed that within the last year, my interior fan rattles when it is turned on at high speed. "High speed" means anything above 3 bars on the climate system. The noise starts to be heard. The higher the fan speed, the louder the rattle. It doesn't sound like a leaf got stuck in there, since it sounds "harder" than that. It sounds like some piece of plastic is knocking against another at a high rate. (Besides, there's a filter, so leaves should not get into the vent system.)

Anyone have this happen to them? And more importantly, is there a way to fix it assuming the cause is known? Otherwise, the fan works perfectly; the noise is just a bit annoying. That's all.

Eric

ericinca Member

ericinca

Posted
  • Author
Posted

Did you try a search... ;)

Loren, thanks. I did do a search before posting but didn't locating any relevant articles. Apologies if I missed something that was a popular topic some time ago. Maybe you can give a pointer?

Eric

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Loren Member

Loren

Posted
  • Admin
Posted

It is likely the weatherstripping foam or even a leaf.

Sometimes you can pick it out with a long handle forceps by removing the pollen filter and going in through the opening.

  • 4 weeks later...
ericinca Member

ericinca

Posted
  • Author
Posted

It is likely the weatherstripping foam or even a leaf.

Sometimes you can pick it out with a long handle forceps by removing the pollen filter and going in through the opening.

Loren,

Just wanted to let you know that you are a genius!

I just replaced the pollen filter with a new one (it was dirtier than the engine's air filter!) and put my hand into the opening. Lo and behold, there was a loose piece of insulation in there that was tumbling with the fan! Don't know how it got there, and as I felt around the opening, I didn't feel that anything had come off around the sides.

In any case, I put in the new filter, turned on the fan, and the rattle was gone!

What had been bugging me for a year is now fixed. Thanks again for your help!

Eric

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