It was working fine up until 10 minutes ago. I hit the defrost button and nothing, but I did hear a click noise activating every time I pressed one of the buttons. However no fan. I checked the fuses and they are all good. Any ideas? I need a new fan motor? help me its still January!!!

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1985 300TD Turbo Diesel Wagon
273,000 miles

Brushes wear out on these motors. Try hitting the motor. If the brushes are bad it might jar them functional. There are threads on how to install new brushes. Once you see the price, I doubt you'll want a new motor.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

how do i make sure its the fan and not the CCU?

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1985 300TD Turbo Diesel Wagon
273,000 miles

Check for voltage at the fan with the defrost button pushed.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

its a 30-45 min job to remove the blower and clean and check it out, stretch out the springs pushing on the brushes

good thing to do if you never have

3 bolts, maby 8mm i forget

and needle nose will be needed

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1985 300D - 599,xxxk - blue interior #265 Monark Nozzle, AL129X, 15" Ronals, Gen II Big Brakes hunting
1985 300D - 491,xxxk - in prog-{A-A IC, 3" exhaust, psi\pyro, 28*BTDC, Hella Euros, IP Limiter removal
1985 300TD - 783,xxxk - parts car,used new engine with ALDA cap inplace
1987 Kenworth T-600 8LL 425 CAT Mech. - 6,000,000+k - DEI exhaust wrap, punched through resonators, 1 recent rebuild,

Yup, it's easy to get out. If smacking it gets it to start, you can be pretty sure the problem is the motor, not the controller. My 300D is now on it's third motor.

okay so on the way to work this morning the blower motor started operating. The front defrost button was already depressed and at some point the fan kicked on and started working. Is this the CCU or is this still the actual fan that is broken?

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1985 300TD Turbo Diesel Wagon
273,000 miles

I just went through the blower motor removal and inspection. It does sound like your brushes are on their last leg. I would pull it out and inspect them, it is quite simple.

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1982 240D 225K


1986 VW Jetta (gasoline) 379K


1988 BMW 735i 168K

I would bet it is the blower motor too. If you have never messed with it, now is the time to take it out and have a look. It is easy to remove and easy to repair as stated above. If the brushes look like they have some life left, you can try stretching the springs out a little or putting a "shim" in behind the springs to put more pressure on the brush. This will "buy you some time" until you deal with the brushes (if it is needed). Lots of threads on this topic.

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AJ

1985 300D (SOLD)

Sometimes when the brushes wear out it'll try and draw more amps to spin it resulting in a blown fuse.
But pull it and check, then inspect the CCU.

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83 SD

84 CD

Unfortunately, you can't buy just the motor for 83?-85 models anymore. When mine was completely burnt up (term board melted) before this last summer, I couldn't find a good working one at a PNP or online, so I had to buy a whole new unit (squirrel cage, motor & backing plate). Something close to $400... But let me tell you, having A/C in Texas is well worth it to me.

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'85 300TD "Puff The Magic Wagon" - Rolling Resto
'19 Mazda CX-9 Signature - Wife's sled
'21 Morgan 3-Wheeler P101 Edition
'95 E300d - SOLD
'84 300TD "Brown Betty" - Miss this one
'81 240D "China Baby" - Farm grocery getter

ebay has them used between 69-99$ right now.

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1985 300TD Turbo Diesel Wagon
273,000 miles