Any idea what this noise might be?
Posted Sep 28, 2021, 4:13 PM UTC
1210
Automatic AC temp sensor, see that little plastic piece in your dash with the circle hole? There's a fan in there.
Buy some silicone based lube (not wd-40) and spray it on the fan shaft, the plastic cover pops right out to make for easier access.
I don't recommend wd-40, it can degrade certain types of plastic and isn't much of a lubricator anyway, it is meant to repel water and break down oils, it does have some lubricating properties but not anything close to actual lubricant. It is literally in the name, WD stands for "Water Displacement".
2
car is a 2002 9-3 2.0t convertible.
never noticed this noise while driving, but that might just be because im oblivious to it. i only notice it when i park the car and pull the key. the noise continues for over 10 minutes after the key is pulled. the noise is coming from behind the center console (i think).
now i dont know much when it comes to mechanical stuff, but to me this sounds like some kind of pump or compressor? something to do with the air conditioning maybe?
1
Yes the fan inside the sensor runs for about 10 mins. After the ignition is turned off. It's designed that way
2
The sensor has a fan in it, when it gets dirty it can start getting loud. You can just pop that sensor out and clean the fan
1
You know how the slot in your phone gets dust n lint? Same deal. You can clean it out and i used machine oil in those little cans.
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That little hole next to the heated seats button. It's cabin temperature sensor. This is what is making the noise. I've never did that myself but I've read that cleaning it stops the noise
This. Just spray a bit if wd-40 into the hole and it should stop making noise
Aight ill check that, thanks. NEVER would have thought that a sensor can make this much noise!
You should use the type of greace that you have in brass instruments apparently
Yup, had the same problem with my old 9-5 -02