Grinding noise from HVAC Fan

jamsterjam · Aug 27, 2009, 11:33 AM

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!

evo_soul · Aug 27, 2009, 06:57 PM

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

misslynn08 · Sep 16, 2009, 10:03 AM

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!

kalpakiotis · Sep 17, 2009, 05:29 AM

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.

misslynn08 · Sep 17, 2009, 10:07 AM

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

MasterAK · Sep 17, 2009, 11:54 AM

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

misslynn08 · Sep 17, 2009, 01:52 PM

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...

FireFighter2968 · Oct 23, 2009, 07:05 AM

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

Bladed · Oct 24, 2009, 12:44 AM

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

misslynn08 · Oct 24, 2009, 04:09 PM

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