I noticed my fan made an annoying sound that I could hear at the lower fan speeds. So I bought a used fan from a recycler and swapped them....still have the noise! I had already replaced the foam on the HVAC doors first thinking the sound may have been related to them.
Replacing the fan assembly was simple and cheap, IIRC the used fan was $35. I'm just living with the sound for now or running the fan at the higher speeds. If I wire the original fan up and run it on my bench I can hear any odd sounds, so maybe there's something else in the system that I've missed.
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1998 Boxster
1991 Carrera
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