bannaruj

I use C220, an aircondition blower has sound that disturb me. Its sound like a high frequency. I take off the blower to lubricate but it won't eliminate the sound.
So . is it anyway to fix it? or has to send to dynamo shop to repair it or is it need to buy a new one? Which method I have to choose.?
thks

osocold707

When my AC was making high frequency noises, it was due to the vacuum pump. It would occur when I was driving at low speeds or stopped at light or something. It wasnt occuring because I was running the AC however so it might not be the same problem that you have. If you give an explanation on when and/or how it is occuring then maybe someone can help you out.

merclover

i think i have the same problem... when driving slow or braking, and the ac blower motor being on, a high frecuency sort of "bird sound" stars coming out of where the motor is. i accessed it to lubricate the axle and the sound went away until the lubricant wore off (WD-40) so im thinking of using grease.
i noticed that the motor is housed in a plastic support attached to the body with some sort of rubber insulators in the middle to absorb vibrations, so i think that when the car is old, this rubber thingy wears out or gets hard and so when braking, the axle in the motor rubs with the plastic support and makes the sound. is this the kind of sound that ya get and/or does it happen when u brake or go through bumps?

DougandhisC280

Merclover: I think your having the same problem that my 190E is having. I haven't fixed the problem yet but I'm pretty sure it's a drain plug problem. Do you hear water swooshing around too? I think it's water getting on the fan which is making the noise. I'm going to try to fix it this weekend and see what I can do. Where is the fan in your car? Hopefully it's in the same place as the fan in the 190. I haven't even started looking yet.

bannaruj

Yes, thank guy for answer but I forgot to clarify more. The sound I 'm pretty sure it come from fan blower. When I set it to maximum speed , sound is gone. but for slow speed "high frequently sound" arise again. It like it need to lubricate. If I use WD40 with it, is it harmful for electric inside?

merclover

yeah! the first time i peeped down there to look at that little motor was when water leaked into the cabin after going through a car-wash and i noticed water had gone all into the ac motor compartment, so im sure something has rusted back there. i was amazed a short circuit didnt occur and the electronics on the car werent harmed (there was water everywhere making contact witht electrical stuff!. the leakage problem was because of a drain plug btw so ur right.
but it aint the water that makes the noise on my car. now its dry and it wont rain for two months more so, it has to be something rubbing in there which is makin the noise.

merclover

no it isnt. WD 40 does not conduct electricity. but is isnt a durable lubricant tho, plus it might leave a NICE smell of oil in ur car if it comes near the air filter which is beside the fan blower.

DougandhisC280

One thing to be careful with WD40 is that it is extremely flammable. If the contact made a spark it could come back in the bottle and explode in your hand. I guess we should try a better quality greese than wd40 to fix this problem. Where was the drain plugged? The car is sitting in the airport parking lot right now so I have no way of looking at it. Once it's back home I'm going to finally fix it. So where is the blower?

JAM

From what I understand the motor is sealed and not meant to be lubricated. Probably need to replace. Pretty easy to find used at the benzbin.

Merc1

Doug,
Did you find the solution to your problem?

fast mayte

hey, i'm getting the same prob. but it comes on some times if i leave the air at like 1 or 2 for like over 10 mins. if just leave it at high speeds, it's fine. prolly some wheel bearing greese can fix this....HAAAA

nazrat

I greased my 95 C280 blower motor with sewing machine oil a few months ago. I haven't heard the sound since. Mine blower had rusted as well, and I know the long term fix will be to replace it entirely.

-Tad

DougandhisC280

No, I didn't figure out the problem yet. The car was in for its 140K service so I'll see what I can find.

michakaveli

Where is the drain plug for the AC system.

My blower motor stopped working. I took the filter out and there was some water in there. I dropped the panel from the blower motor and a little bit of water came out.

What's worse is the floor is soaked with water. I think I'm going to go back downstairs and remove the blower motor. Does the resistor come with a new blower motor or does that need to be purchased separately?

Where is the water supposed to drain from?

DougandhisC280

There should be a drain hose. It is either clogged or has come loose.

rjsr

Just make sure of the following:

1. Make sure drain is not clogged.
2. Drain is underneath plastic moldings at the right base of the winshield.
3. Once you have plastic moldings out, goto gas station, and use an air hose to clear debris or leaves, etc... if this doesn't work do it inversely, there is one hole underneath car on right side.. water should go out tru.. this way.
4. If you can't afford a/c blower unit... goto junk yard and get one for $50 - $150 and make sure resistance comes with it... when having junk yard people take it out.. use t-20 tool ($5.00 hardware store) and make sure they do not damage plastic housing on top of motor.. or broken plastics will cause lots of vibrations and noise underneath...
5. Every 3 months check that drain is always clear...

Good luck.. if you need more help, let us know