I looked at the TSB's and known problems thread but nothing similar to what Im experiencing.

My Fan make random and very loud grinding noises when turned on, regardles if I have the AC on or off.

Anyone else get this?

Thanks!

 

never heard that one. my issue is, my AC fan make a loud click everytime it turns on and off to cool the rad.

sigh

 

Does it almost sound like it's coming from under the dash?
Mine does that, and I believe it's the blower motor clogged. At least, thats what I was told by the dealership.
Try taking out your glovebox and look at the in cabin air filter. If it's super super dirty, it could be that some of that stuff fell down into your blowermotor and clogged it. I'm going through this right now, and am in the process of figuring out how to completely get to it so I can unclog it...

Goodluck!

 

I have that same noise coming out, sounds like a whole bunch of sand is going through a fan lol....seems to have gone away for the last couple of days but i still want to take it out to clean it. I took the filter out to check it, but its still new, barely has 1k miles installed.

 

My car had about 30,000 when it started that noise.... From what I've heard, alot of lancers seem to have that problem, I guess the way its set up doesn't filter a whole lot before going through the blower motor.
Has anyone else had a problem with their low pressure drop valve leaking? Or either drop valve, for that matter?
I hooked gauges up to mine the other day, and realized mine is leaking, and I'm curious if others have had this problem, or if I just got 'lucky' with mine... haha

 

Remove the glove box.
Remove the filter and turn on the fan and look if anything looks wrong with the blower motor.

 

You really can't see anything by doing that though. From what I can tell (from what I've done so far), you have to somehow get the casing off, which would be somewhat easy if you can get the bottom of the dash off, where the blower motor essentially sits. But just from looking through where the filter is, you can't see the issue at all. From what I can tell, you'll have to get the casing off somehow... somehow get the blowermotor out, maybe.
It could be a clog in the tube that connects to it (if you feel around the bottom left of the blowermotor, you'll find a clear plasic tube that leads to it...I think the clog is where that tube is connected..sorta...hard to explain)...

Anyways, I have a friend from my school getting diagrams for me today, so if I can, I'll try to scan them in tomorrow so you can see them, too...

 

Any resolve to this issue as of yet? I have the same problem

 

I have the same issue, car has about 31,000 miles now. It sounds really horrible.

 

Unfortunately, no. I took apart the blower motor area by taking the glove box out and the bottom piece of the dash out (just remove a couple pins). I took the entire blower motor apart, and couldn't figure out what's making the noise at all. But I did find out that it's not blowing cold air because the low pressure drop valve has a leak, I added some refrigerant to it and it lasted about a month and a half (now it's out again..). I will let you know as soon as I figure something out for it...but for now, can't figure it out

 

Any update to this? I notice that it doesn't make the sound until I run over a speed bump or pot hole and the sound goes away when i hit another bump. Sometimes the fan will come on if I just leave it on for awhile but if I turn it up to max speed for like 30 seconds the sound will go away.

 

After thinkin about this for a while, I think the most logical explanation is that it has to do with the evaporator behind the dash. What happens is that depending on the relative air humidity and temp, moisture can build up on the outside of the evaporator. Normally, this accumulated water should just go down the drain valve, but I think there may be a clog somewhere along the line so it is somehow getting to a fan or motor.

What really leads me to believe that this is true is because if you take a hard left turn you can hear what sounds like sand against a fan. When you take a hard right turn, the sound mysteriously diminishes if not goes away completely.

 

Mine doesn't have that issue specifically. The "hitting bumps" thing does it for me, but it doesn't sound like anything "moving" in mine. When I looked at it further (and got the opinion of my old neighbor, who specialized in AC), it seems like something somehow made it passed the filter and bent one of the blades on the blower motor fan, only slightly. Now when it spins, that blade is barely scraping the side of the casing.
Then again... who knows anymore? The dealership never even called me back with my ordered part (covered under warranty) for my drop valve. I'm going back this weekend to complain and try to get it all fixed (I live in AZ. Summer without AC is horrible. I've gone without for about 5 years now, I'll be damned if I'm doing it again in a relatively new car).

If anyone else finds a solution, let me know. I'm going crazy here.

 

Oh, Bladed, my issue is the exact same as yours. FYI. I've taken the entire thing apart time and time again, and the only thing I can come up with is a slightly bent blade... :/

 

I heard or read somewhere (cant remember where) that it was a busted bearing in the fan itself, when it settles it stays smooth, when you hit a bump, it throws it outta whack and starts grinding, I have an issue also when you hit a bump.
Has anyone taken apart the actual fan yet?
I havent had the time to take it apart yet.