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  #1  
Old 12-26-2009, 11:05 AM
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W201 Blower Motor-- not having defrost sucks

My blower motor has been squeaking for a while and recently blew the fuse. It worked for a while but then started making an awful rattle and blew the fuse again. I'm guessing the motor is toast and needs to be replaced.

Is there a w201 blower motor repair tutorial on here somewhere--is it similar to the w124 procedure? I've got a haynes manual that is less than helpful--do you start taking apart the firewall on the passenger side to get to it or take the wiper assembly out and go in from the top?

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  #2  
Old 12-26-2009, 07:26 PM
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Location: Old Lyme, Connecticut
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My son did this a year or so ago on several of our 16 Valve 190E's. He took pictures and posted the procedure:

W201 Blower Motor Removal/Installation (Large Pics)

Good luck,

Jim
__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)
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  #3  
Old 12-27-2009, 03:42 AM
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Quote:
Originally Posted by JimSmith View Post
My son did this a year or so ago on several of our 16 Valve 190E's. He took pictures and posted the procedure:

W201 Blower Motor Removal/Installation (Large Pics)

Good luck,

Jim

woah, woah, woah. jim. hold on a second. calm down. you mean to say you have SEVERAL 16v 190e's? dude, post some pics man. that's like the sickest mercedes ever made.
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i know Jim Smith. i don't actually know him, but I know of him
http://imageshack.com/a/img923/6201/RQ1H6A.jpg
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  #4  
Old 12-27-2009, 11:09 AM
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Quote:
Originally Posted by Sev View Post
woah, woah, woah. jim. hold on a second. calm down. you mean to say you have SEVERAL 16v 190e's? dude, post some pics man. that's like the sickest mercedes ever made.
Yeah, I bought one new, a Euro, through a friend who still lives in Munich back in 1985. My oldest son was born in 1985, so when he turned 18 I gave it to him. We have 3 kids, so the premise was I would give them their first car, and that it would be as old as they were or older. So, 3 kids, 3 old 190E 2.3-16s. The youngest one has become quite the mechanic and has just finished, well, this job is never finished, technically, installing a modern fuel injection and ignition system on his. He is looking to add a turbo in the future. My daughter gave hers back to me, and bought a C230 Sport when she left home and got a job. My original one is being refurbished - the body is pretty much done and the interior is next. That car has 265,000 miles on it and is still running on the original everything except a couple of valves and the valve guides/seals. We have become quite proficient at removing the head, having it rebuilt and reinstalling it. The other two are inching up toward 200,000 miles. So, at the moment they are all "home" buried under a foot of snow. Or they were. It rained here last night.

Jim
__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)
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  #5  
Old 12-27-2009, 02:45 PM
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Quote:
Originally Posted by JimSmith View Post
Yeah, I bought one new, a Euro, through a friend who still lives in Munich back in 1985. My oldest son was born in 1985, so when he turned 18 I gave it to him. We have 3 kids, so the premise was I would give them their first car, and that it would be as old as they were or older. So, 3 kids, 3 old 190E 2.3-16s. The youngest one has become quite the mechanic and has just finished, well, this job is never finished, technically, installing a modern fuel injection and ignition system on his. He is looking to add a turbo in the future. My daughter gave hers back to me, and bought a C230 Sport when she left home and got a job. My original one is being refurbished - the body is pretty much done and the interior is next. That car has 265,000 miles on it and is still running on the original everything except a couple of valves and the valve guides/seals. We have become quite proficient at removing the head, having it rebuilt and reinstalling it. The other two are inching up toward 200,000 miles. So, at the moment they are all "home" buried under a foot of snow. Or they were. It rained here last night.

Jim
jim, you're my new hero. no, seriously. i mean, to have bought one of your cars brand new and have it grey market imported is an accomplishment in and of itself. then, having three kids is a monumental thing. and then, giving each one of them a 16v, and working on the heads yourself, and giving one to your daughter, plus the electronic fuel injection and rebuilding the cars makes you one of the coolest guys on this forum. also, you're like the only guy i know who'se bought their 16v brand new. just the act of having kept it for 25 years earns you major points.
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http://imageshack.com/a/img923/6201/RQ1H6A.jpg
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  #6  
Old 12-27-2009, 03:31 PM
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Location: Old Lyme, Connecticut
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Thanks. The W201 chassis is one of the best MB put into production in terms of longevity and the 2.3-16 models are mechanically very robust and not that difficult to fix if something goes wrong (like the SLS system on the 16 valve units). Seems most of the parts came from earlier MB products, or items in production at the time the W201 came out, and were very well developed and robust. The blowers all suffer from the same basic problem, but I can't fault a machine that lasts more than two decades before deciding to give up the ghost - the blower is always on at some speed.

I keep all my cars until I can't fix them anymore. I have only missed 200k on my 1991 350SD (rebuilt the engine at the dealership and then it started smoking again within 10,000 miles so I dumped it at about 167K) and on a leased C230 Kompressor (W202) as it got such poor gas mileage with my wife driving it with the Kompressor engaged all the time I replaced it with the 300E 5-speed (now with about 215K).

Hope the guy who started this thread got his blower motor replaced. It is really not that big an ordeal.

Jim
__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)
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  #7  
Old 01-04-2010, 04:11 PM
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Join Date: Nov 2007
Location: Raleigh, NC
Posts: 109
This tutorial is great--the Haynes manual starts with the cage cover exposed. Without this I don't think I would have gotten to the point where the cage cover would be visible.

I just purchased a new fan motor and am going to attempt the repair this weekend--more to come.
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  #8  
Old 01-09-2010, 05:55 PM
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The tutorial is great--the old fan came out and the new one was in in less than two hours. The only problem is that it still doesn't work. The connections are good and the fuse is new--what's this I hear about a fan transistor?
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  #9  
Old 01-09-2010, 10:42 PM
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I am not aware of a transistor in the circuit. If you have a voltmeter, check to see if the power to cable ends that connect to the motor are "live." Meaning at full speed there should be 12 Volts. Also, try applying 12 Volts to the terminals on the motor to see if it works at all. Let us know the results.

Jim
__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)
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  #10  
Old 01-11-2010, 05:17 PM
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Join Date: Nov 2007
Location: Raleigh, NC
Posts: 109
I had to put it all back together to drive to work this morning. Before I did that I made sure the electrical connections were solid and the fan could turn freely.

I can test voltage at the fuse right--to let me know if the circuit is energized? I'm starting to think I might have a ccu issue too. I'm going to put voltage to the old fan, and if it starts right up, then my theory might be strengthened--though the sounds it made before it went dead led me to think it was definitely the fan.

On an unrelated note--what is the vacuum pump that is inside the passenger side dash, just below the right-most vent? Mine comes on each morning when I start the car--does this mean a leak in the system somewhere?
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  #11  
Old 01-11-2010, 09:08 PM
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Quote:
Originally Posted by bmeares View Post
I had to put it all back together to drive to work this morning. Before I did that I made sure the electrical connections were solid and the fan could turn freely.

I can test voltage at the fuse right--to let me know if the circuit is energized? I'm starting to think I might have a ccu issue too. I'm going to put voltage to the old fan, and if it starts right up, then my theory might be strengthened--though the sounds it made before it went dead led me to think it was definitely the fan.

On an unrelated note--what is the vacuum pump that is inside the passenger side dash, just below the right-most vent? Mine comes on each morning when I start the car--does this mean a leak in the system somewhere?
Your problem appears to be no power to the terminals of the motor. Unless the new motor is also bad. Which is why you should try just putting 12V on the terminals of the old motor and the new motor.

The fuse box check merely means there is power to the fuse box. I think a few other items may run on the same fuse. If so, see if they are working. Your problem can be as simple as a rat ate through the wire to the motor, and the noise you heard was the rat eating 12Volts when you turned the fan on.....not really. Although the squeaking and groaning noises they make bring rodents to mind.

Really, in an older car the wires loose insulation due to vibration and rubbing, and then you can get corrosion in there if it gets wet and wire will just break without blowing a fuse. I had the vacuum pump under the rear seat that operates the door locks die. I traced it to a line under the driver's footwell, where vibration and a likely damaged (at installation in the factory) outer insulation covering allowed salty water from the Northeast's road salting practices to get in there and corrode the wire all the way through. I had to track it down and then splice it. No more problems, but it was not the most peculiar wiring insulation failure I have seen.

So, test the one that is out, check the other things that run on that fuse, and, assuming they do work and the old motor doesn't, then mine your way back to be able to put 12 Volts on the motor and tell us what the deal is...if the old motor works and the other stuff on the same fuse works I think you need to rerun the wire from the fuse box to the switch or the switch to the motor, or the motor to ground.

Hope this helps,

Jim

PS: I know of no vacuum pump in the dash. You do have a vacuum pump under the passenger side, rear seat cushion in a little foam enclosure. It sounds like you have the more elaborate climate control system with vacuum actuators here and there. That was standard on US models I believe. I have one US model and have yet to have to dig into that area. My Euro's have a simpler system with manual selection of where you want the air flow to go as well as temperature controls (you turn the knob in the direction of hotter if you are cold, and then cooler if you are hot, and then turn the AC on if you are really too warm, and again, select the appropriate duty cycle to suit your comfort level by pushing a lever to cooler or less cool).

From what I hear the actuators are neither expensive or that hard to actually replace, just a pain to gain access to in some cases.

Sorry I can't help you more.

Jim
__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

Last edited by JimSmith; 01-11-2010 at 09:18 PM.
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  #12  
Old 01-11-2010, 10:17 PM
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Quote:
Originally Posted by JimSmith View Post
My son did this a year or so ago on several of our 16 Valve 190E's. He took pictures and posted the procedure:

W201 Blower Motor Removal/Installation (Large Pics)

Good luck,

Jim
not bad a writie up but the w201 with the m103 is a little different
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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)
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  #13  
Old 01-13-2010, 06:01 PM
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Quote:
Originally Posted by JimSmith View Post
Your problem appears to be no power to the terminals of the motor. Unless the new motor is also bad. Which is why you should try just putting 12V on the terminals of the old motor and the new motor.
I put power to the old motor and it started up, so there's definitely no power getting to the new motor. I do have the vacuum actuated system--and it is a massive overcomplication of a what should be a simple system. I'm thinking my ccu is bad because in the last days of the old blower motor's life, I sometimes had to hit the buttons on the CCU several times to get the fan to start. I'll dig more and report back.
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  #14  
Old 01-13-2010, 09:44 PM
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If you blew the fuse- it could be a short at the switch.
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  #15  
Old 01-25-2010, 05:29 PM
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Location: Raleigh, NC
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I swapped in a new climate control unit for the old one, and I'm back up and running!

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