I've noticed lately that my AC system has been blowing either really cold (wheel all blue), or really hot (wheel all red) -- nothing in between. Turning wheel to white area does nothing, so I put the AC sampling grid (on dome light) to the tissue test and it failed -- no suction at all@!

So tonight I pulled the sampler motor from behind the glove box expecting to find a dead motor, which wasn't the case. It seemed to be pulling plenty of power ... fins were turning pretty well, but there was still no suction even at the tube leading from motor. I pulled it out, cleaned it up well and re-installed it with no luck.

Then I wondered, how does this motor produce any suction when the fan is exposed like it is?! Is there supposed to be a shroud around this little motor's fan blades? I'm guessing not, because mine looks just like the photo that WorldPac provides.

Any help here would be greatly appreciated!

TIA!

__________________
-Paul-
'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi

You know, I was looking at that grid last night, wondering what it was...

Now I know, and if you'll excuse me, I have a date with my car and a Kleenex.

Thanks. Good luck with your problem.

__________________
MB 1986 190D in my past
MB 1987 300E on the street
MB 1994 'Smoke Silver' E420 in my driveway
1999 Mazda Miata in the fun stable
1964 E-Type Jaguar Coupe- Sold
1970 E-Type Jaguar Coupe- Sold
1968 Corvair Monza Conv. with Turbo Transplant- Sold
1986 Merkur Xr4ti- abandoned
various mundane American autos

If I'd known then what I know now...

Hell, I'd probably still have done it anyways.

where's the motor located if your car has a passenger airbag?

thanks.

matt
'94 e320

mcdill:

I'd imagine yours is in same place as mine. It's located just to the right of glove box, underneath the dash vent. You have to pull the glove box out to get to it.

__________________
-Paul-
'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi

To finish this post off for the archives, my sampler blower motor, although it appeared to be spinning fast enough to create enough suction, wasn't. I would imagine that this is normal for an 11 year old motor that is constantly running, even when the AC/heater system is turned off.

To remedy the problem, I taped shut 3 of the 4 ventilation squares to create more suction, and voila, it worked. I checked it by placing a piece of tissue onto the grid of the temperature sensor, interior air on dome light and it stuck. Not sure how long this patch will hold, but it's better than a $55 replacement part.

My ACC system is very precise after the fix. The slightest turn of the wheel will now reduce fan speed or alter cooling/heating air temps.

Hope this helps someone. :p

__________________
-Paul-
'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi

I am impressed. Great closure... I wish more of the members would post their result, and in with the original thread, precisely as you have done.

Great job.

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)