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chirping from the heater/ac fan

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Old 03-17-2009, 09:04 AM   #1
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chirping from the heater/ac fan

On my '05 E500, at normal speeds, the fan for the heater/ac makes some light chirping noise. Can't hear it if the stereo is on but it's quite annoying when driving without the stereo.

If I turn the blower speed higher or lower, the chirping sound stops. Unfortunately, the auto blower control has the fan at the chirping speed 99% of the time.

Anyone ever experience this and fixed it?
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Old 03-17-2009, 09:26 AM   #2
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Quote:
Originally Posted by Eich View Post
On my '05 E500, at normal speeds, the fan for the heater/ac makes some light chirping noise. Can't hear it if the stereo is on but it's quite annoying when driving without the stereo.

If I turn the blower speed higher or lower, the chirping sound stops. Unfortunately, the auto blower control has the fan at the chirping speed 99% of the time.

Anyone ever experience this and fixed it?
You will pretty much have to replace the blower from my experience. Mine did it when it was cold, when first starting in the morning. The blower is fairly easy to replace and would be covered under warranty, if you have one.
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Old 03-17-2009, 04:27 PM   #3
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Quote:
Originally Posted by Eich View Post
On my '05 E500, at normal speeds, the fan for the heater/ac makes some light chirping noise. Can't hear it if the stereo is on but it's quite annoying when driving without the stereo.

If I turn the blower speed higher or lower, the chirping sound stops. Unfortunately, the auto blower control has the fan at the chirping speed 99% of the time.

Anyone ever experience this and fixed it?
I had it on my '04 till I was out of the car. Since my Radio is on all the time I only heard it at low radio volume at a traffic light stop.
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Old 03-17-2009, 04:47 PM   #4
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You will pretty much have to replace the blower from my experience. Mine did it when it was cold, when first starting in the morning. The blower is fairly easy to replace and would be covered under warranty, if you have one.
Thanks. I am under warranty but wonder if the service department would take the complaint seriously enough to replace the blower motor.
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Old 03-17-2009, 05:17 PM   #5
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Thanks. I am under warranty but wonder if the service department would take the complaint seriously enough to replace the blower motor.
EPC shows 2118300908 replaces original 2118300408 installed at factory this should support your warranty replacement request if you want documentation to present PM your email address and VIN.
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Old 03-17-2009, 09:02 PM   #6
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Old 03-17-2009, 09:02 PM   #7
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I HAVE an 06 e500 with the same exact problem.
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Old 03-18-2009, 03:05 AM   #8
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same problem here... 04 e500 4matic
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Old 03-18-2009, 12:35 PM   #9
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Funny how such a small noise can be so annoying ! Drives me crazy when I'm trying to enjoy a quiet ride somewhere.
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Old 03-19-2009, 08:46 AM   #10
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Thanks. I am under warranty but wonder if the service department would take the complaint seriously enough to replace the blower motor.
They should. Mine was replaced under warranty at 78,000. I have the 100K warranty
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Old 03-19-2009, 08:34 PM   #11
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chirping

I have the same thing, especially when headlamps are on and brake depressed
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Old 03-19-2009, 09:31 PM   #12
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Funny how such a small noise can be so annoying ! Drives me crazy when I'm trying to enjoy a quiet ride somewhere.


just noticed it today for the first time. I'm out of warranty.
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Old 03-20-2009, 08:47 AM   #13
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just noticed it today for the first time. I'm out of warranty.

Not a problem. Take it to the dealer,, describe the problem, ask them to fix it, Then open your wallet and tell them to take what ever they need.
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Old 03-20-2009, 10:35 AM   #14
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just noticed it today for the first time. I'm out of warranty.
I hope my post didn't cause you to start listening for it !

I wonder if it's easy enough to get to the blower motor as a do-it-yourself project ? Would be nice to lookup in the MB service software to see how difficult it is to get to the motor.
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Old 03-20-2009, 01:41 PM   #15
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I have the same problem with my A/C. Sounds like a humming noise, and really annoying when the radio is off. Should I address this issue to my service advisor on the next scheduled maintenace? Also should it be covered on the extended warranty?
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Old 03-21-2009, 09:55 AM   #16
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I have the same problem with my A/C. Sounds like a humming noise, and really annoying when the radio is off. Should I address this issue to my service advisor on the next scheduled maintenace? Also should it be covered on the extended warranty?

YES & YES
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Old 03-21-2009, 01:00 PM   #17
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I have the same problem when I first turn on the heater on my 04 E55. If I'm alone it doesn't bother me but when I have passengers its a little embarrassing. My extended warranty will cover it.
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Old 04-16-2011, 11:47 PM   #18
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What's the costs w/o warranty??? Mine started doing this 3mos after warranty ended! Sounds like a problem after about 5-6yrs! My old 14yr old land cruiser has never had any creaking noises at all and the a/c still blows much stronger and colder than my MB!
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Old 04-17-2011, 07:45 AM   #19
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Very Common Problem. Sorry, photos are missing
This has been documented pretty thoroughly. The Behr motor waqs about $130 several years ago. It is an OEM part. I am posting the write up I did several years ago
I have found so much useful info on this bord, I decided to document this fairly simple repair in appreciation of all those who have gone before me.
This was documented on our 2003 E 320 with ANALOG controls

First, remove the front passenger floor mat and get something to cushion your knees. If over 40, go ahead and take some Aleve.

You will need a few tools (image 055)

I used a #25 torx bit to remove the panel (image 54) that is held by two machine screws. It is accessible directly beneath the glove box. There is a built in duct that directs air to your feet, care in removing it by flexing it slightly . It was somewhat difficult to re- install. Note that the cover square duct goes OVER (outside) of the dampered portion of the heater duct. There is one friction plug as well as the two screws. There is a plug that powers the lamp, pinch and tug gently to disconnect.

Now we have exposed the bottom of the fan compartment (image 053)

There are 4 torx screws that need a #20 bit. Three are deep in plastic wells and are not visible. You must feel for the bit to engage and turn them cw.
The one in the rear that is surface visible required a short shank #20 torx bit and a 1/4 in drive because of clearance to the floorboard. These are a ***** to put back. You need either a magnetic tip or a telescoping sleeve used with battery drills to support the screw while you bullseye it blindly in the recessed hole. Scotch tape did not work for me.

You should be able to "crack" the bottom cover Slide it carefully along the wire and expose the plug on the bottom of the speed controller. Pinch it hard and gently tug. The fan is now free of encumberances save the 4 screws.

There are 4 each #20 torx screws that hold the fan inside of the scroll cage.
Support the fan with your hand or a short stick and remove all four screws.

Your fan should look like image 046.

Image 038 shows empty scroll cage after fan is removed.

Remove the fan speed controller (two #20 torx) and fan power plug (same drill, pinch and tug gently)

Your old fan should now look like image 043.

Now reattch the controller to the new unit. Should look like image 046 again.

Insert the fan/ controller back into the void scroll cage.

You must hold the fan with one hand and insert at least two screws hand tight before allowing it to hang. Install the two remaining screws and tighten all. Attch plug back into controller

Reinstall the fan compartment cover with the three deep well screws and one surface mount- image 053. Reinstall wire in two plastic looms

Reinstall large knee cover with two machine screws #25 torx and make sure the duct is engaged. Screws won't align unless it is correct.

Test motor. Annoying squeak is gone for a few more years.
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Old 04-17-2011, 10:26 PM   #20
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I had this problem with my car at 30K miles and it took me demanding the SA to ride in the car with me to hear the noise. They claimed there was no noise, each of the first 3 times I had it in for this problem.
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Old 04-17-2011, 10:33 PM   #21
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When mine started making noise, I removed the fan motor and oiled both sides of the motor shaft. It has been completely silent at all speeds for a year now.
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Old 12-16-2011, 10:28 PM   #22
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This just started on my E63. Does this get worse as time goes by? I have an aftermarket warranty so I'll need to see if it's covered because it's not really broken per se, just annoying.
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Old 12-17-2011, 09:24 AM   #23
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its an easy DIY fix, like foreyes says above.

I gave mine a squirt of graphite lubricant and its been quiet ever since.
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Old 12-23-2011, 03:07 AM   #24
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Followed the DIY up top, instead of replacing the blower I lubed and greased the bearing. I saw post from two other member that had luck trying that, so far so good since I have gotten no chirps/noise at any speed. I will updated this thread after some time and mileage.
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Old 01-29-2012, 09:53 PM   #25
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DIY Fan Fix

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Originally Posted by AzCamel View Post
Followed the DIY up top, instead of replacing the blower I lubed and greased the bearing. I saw post from two other member that had luck trying that, so far so good since I have gotten no chirps/noise at any speed. I will updated this thread after some time and mileage.
AZCAMEL, Would you happen to have any pics available? Also are you still experiencing silence. Thanks
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2005, 2118300908, ac, blower, car, chirping, covered, e500, fan, g35, infiniti, low, motor, sound, speed, warranty


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