As you might have read, none of my climate controls work. When I hit the defrost bottom I am hearing soemthing move in the vents, but no air. Anyone have an inexpensive fix for this? I will freeze all winter if I ahve to, but I need to see ...

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1981 300D 205,000 mi.

Why do you want the "cheap fix" vs just plain fixing it????
I guess you can buy a towel.......

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

I didn't get any suggestions how to fix it for real in my other post. I'm going outside to hook up the blower motor to a 12v to check it.

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1981 300D 205,000 mi.

If your hear the flaps moving it sounds like your vacuum and climate control are working but the fan is just not running. First check the fuse and make sure power is getting to the blower motor. If the motor is getting power but not running you may be lucky and be able to fix it by changing the brushes. This has been written about quite a bit, see this thread for example W123 blower motor brushes -- any interest?. Folks have reported getting motor brushes from the local hardware store and grinding them down to fit. It's just a chunk of carbon with a wire attached to it. Otherwise a new blower motor it is.

Ive been dealing with a similar issue. I had to buy one of those crappy 12 "heaters"
It puts off just enough heat to remove condensation in a rain storm.
please let me know if you get any good suggestions on diagnosis steps.

ck

I changed the fuse, and the connection looks good. The plastic backing had been melted, however.

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1981 300D 205,000 mi.

Getting back to actually fixing it, have you verified if the blower motor is working? If the fuses and the motor are OK, the CCU is a likely suspect. Also a bad blower motor of bad aux water pump can toast the CCU, so it's possible that the both had issues. When I replaced my CCU, I also replaced my blower motor just to be safe.

Move in with JimmyL in Texas, and borrow that stupid "fan" in his sig. area on defroster days.

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'06 E320 CDI
'17 Corvette Stingray Vert

Your blower fan has been drawing too many amps as it has aged, and has resulted in the melted plastic backing at the fuse. Mercedes issued a TSB for this and sells a "kit" that moves the blower fan fuse outside the main fuse box and increases its amp rating. See search for details.

Odds are, at this time, your blower motor is not good (bearings, brushes, whatever). Test it with 12v. to be sure, but a new/used blower motor fan, with some attention to the fuse situation, will probably give you some hot air. They're not real difficult to swap out. If you really want to get into it, and have a fair amount of electro-mechanical experience, they can be disassembled and repaired,...sometimes.

Here's one:http://cgi.ebay.com/ebaymotors/Mercedes-W123-Heater-Blower-Motor-Turbo-Diesel_W0QQitemZ230193565741QQihZ013QQcategoryZ33546QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

another:http://cgi.ebay.com/ebaymotors/Mercedes-123-Blower-Motor-280E-280CD-300D-300CD-300TD-T_W0QQitemZ170171260653QQihZ007QQcategoryZ33546QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

I'd look for a decent looking one, that spun freely (bring a motorcycle battery) at the wrecker's yard.

Good luck ....... advice offered FWIW

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)

Thank you sir, I will be looking for them both.

I see those two are both listed for 330d's from 168, I thought my 81 was 167...am I wrong?

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1981 300D 205,000 mi.

I think the fuse TSB was for W124 bodies.

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Bill

Backyard Shadetree Mechanic, 30 years running.

1987 300TD
1988 300E (sold, sniff)
1999 S320
1981 Volkswagen Rabbit Truck (Diesel)
2001 Ford Expedition
1988 Suzuki Samurai
On my list to buy: R129, for me, and a R107 for my wife.

Look at the top of the page of the diesel forum for "Search this Forum" or click here http://www.peachparts.com/shopforum/diesel-discussion/?nojs=1#goto_forumsearch

Search for CCU, or defrost, or heat. There are lots of threads covering this subject. As has already been suggested:
1. Check your fuse (don't just look at it use a meter, should have 12v. on both sides)
2. Check that you have 12v. at the blower motor
3. Remove the blower motor
4. Run a ground wire from the battery and a hot wire (not a bad idea to put a fuse in this line) to the blower motor (see if it runs), if not repair or replace (do a search on this)
5. Remove the CCU from the dash and re-solder ALL the connections(there are numerous threads on this subject also)
6. re-install CCU and enjoy warm heat and defrost

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'83 240D (for sale)
'84 Harley FXRT
'85 300CD Turbo (Sold)
'85 500SEC (for sale)
'04 Dodge Dakota Quad
'06 Harley FLHTCI
'97 SL320

hitwtom, go back a page and read my post about checking and replacing the fuse, than checking the blower motor and finding it operational. Than sit next to me as I searched for an hour last night and this morning, and didn't read 'resolder all connections even if they look alright'. Than you can post your message. You didn't read my post about checking the fuse and blower motor even though it was two posts ago, how can you expect that I found the information you expected me to find? That was great advice you gave about resoldering, and I'll try it, but just leave it at that.

Why do people feel the need to reply and scold? Congratulations, you have declared yourself the authority of this corner of the world. I don't usually get upset, but I see a lot of such messages on lots of information centers. If you think someone is your wasting your time, don't post, they are wasting more of it. Or assume that they are new at this, as you were, and go on your merry way.

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1981 300D 205,000 mi.

This one will get the driver and passenger sides.



I had to remove the fan from the Squash, remove the squirrel cage, disassemble the fan and clean the bushings and the com shaft ends. Picked up speed and lowered the amp draw. My brushes were OK, but if not it would have been easy to replace.
I imagine I will have to do that soon in China as that fan barely blows in comparison.

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

It's time for bed so I havn't gone out and checked the blower, but I was trying to install my radio earlier and reachign around back there I was suprised by oil. So I did some searching. One guy was told his car could have been driven too long with a faulty shut off valve and oil got into the climate control vacuum lines. I have no problems at shut off.

Could this be freezing up all my climate stuff?

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1981 300D 205,000 mi.