Blower motor service and fix / repair for Mercedes Benz

Blower motor service and fix / repair for Mercedes Benz

The blower motor was screeching when it was on.

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Sylvester Ward says:

What number is the fuse that goes into the side panel by the door on the driver side for the AC blower

Jim Buford says:

The hammering you were doing is what we call peening over the metal. I just bought a 1999 E300 turbo diesel with 101k miles on it. The last owner had it for 12.5 years and put only 4000 miles on it. Apparently blower not used enough and has gotten frozen in place. I will expose it and tap it a few times with a soft rubber mallet and see if that frees it up.

a.c. king says:

The fan on my SLK320 stopped working. I took it out of the car to check it and found one of the connectors to the motor housing was a little loose. I plugged back in to the car and turned it on and it would work sporadically when I wiggled the wire. Turns out the solder connections had come apart inside the motor housing (like he shows at 2:55) The way my unit is made it's very hard to get the housing off to re-solder the connection. So I removed wire and carefully heated the connector with a micro-torch for a few seconds, which remelted the solder and restored the connection. Now it works like a champ! I was about to buy a new fan, the fix cost $0. I don't know how long it will work, but it's working now.

AmericanRX says:

Thanks, found the filter blocked and a bad connection on the motor.

Rio Raydy says:

So you open the cap with the angle grinder??? Or is there any other way?

MrSkyrider226 says:

wher can i bay the repair book fore 1995 s class i will chans air kontroll but i dont now have i take it out

Joshua Ananth says:

Very good explanation. My W210 E240 has a noise when the car moves or on uneven surface.

Stephen B says:

So instead of replacing it and getting a warranty you spend how much of time repairing at home. Ridiculous.

Channel Tube Play says:

Any idea what this sound is on a Mercedes? https://www.youtube.com/watch?v=560X1Sg–0E

Alan Malagon says:

I have a 07 gl450 and sometimes when I have the heat on it smells like burning smell coming from the vents? Happened once in a while, can it be the blower?

Eyes Wide Shut says:

Hello everyone. I just wanted to share how I got my blower motor to work
after it started to work intermittently. Just to let you know, I did
replace the blower motor voltage regulator. But the AC would still only
turn on intermittently. So what I was going to do was the repair in this
video but I couldn't get that top piece off after drilling. I left it
on and took a large can of WD-40 and prayed the heck out the unit on the
inside using one of the top holes so that the electronics, brushes and
electrical connections were on the bottom. The WD-40 cleared all the
dirt and grime that had accumulated inside. The residue was black and
was cleared out of the unit with the WD-40.

That took care of the cleaning on the inside and also cleaned the electrical contacts of dirt and grime. Remember I used an entire can and prayed multiple times to clear all the dirt and grime. Let the unit sit in the sunlight for a day before you continue. This will evaporate the WD-40 and ensure that you do not damage the unit if the contacts are still wet.

Then came the most important part, that is also addressed in this video. You MUST clean that copper contact post where the brushes come in contact with. That post gets so much grime and oxidation that the electrical contacts become unreliable. Since the WD-40 took care of the dirt and grime, you have to take a small flat head screwdriver and scrape the metal to get it shiny again. Take the driver and carefully scrape top to bottom. Clean one section at a time by turning the fan portion. Once the electrical post looks shiny all over you will guarantee that a strong electrical connection with the brushes will be established. The guy in the video even mentioned that he was getting double the current than before the cleaning and scraping.

My unit started working immediately after installation and even seems to be stronger than before. Its been good. These units are well made but unfortunately get dirty over time and do need to be maintained. Mine is located in my 2000 Mercedes Benz S-500.

Good Luck everyone!

Kyle Smitsdorff says:

SA represent! My blower just stopped working for no reason and without warning. Seems to be intermittent so will try this.

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