benz_addict

After work got into the car which had been sitting for an hour or so started it up and temp set to 74 degrees F but wasn't blowing any air. I thought no problem it's normal it will blow air massively in 1-2 min like it usually does.
After 45 min of driving still didn't come on I'm freezing my *** off it's 23'F outside then it suddenly started blowing air like it should. Climate control works fine it's just the blower motor keeps delaying and comes on when it wants to and when it does it works fine...any thoughts?

THR2008

My car was doing that during the summer. It was the blower motor acting funny. My mechanic played with it hasn't happened since. Sometimes it sounds like a jet when its going out.

Skylaw

Mine had a similar problem,except that after I shut down for about 60 seconds and re-started, the blower came back on. It was a bad blower control unit and blower motor - both replaced under warranty in October.

benz_addict

Do you know what your mechanic played around with?

So my blower module and the fan it self are on it's way out?

I tired that restarting method but didn't work for me I even re-started the car waiting 5 min or so. Hmm... time to fire up the WIS

Skylaw

It may be only the blower control unit - but the tech also found that my blower motor was overheating, and replaced that too.

benz_addict

where is the control unit located? On the fan itself? I'm planning to take it out and inspect it.. the fan I mean maybe I can check out the control unit too

THR2008

Some weird looking thing towards the front. I haven't had the problem again. It was before I figured I could do most of the work myself. I'm guessing it was the blower motor.

benz_addict

is that the blower motor regulator aka the control module? (my work in progress) Also can I order this from the parts department separately? It has the part number "A 230 821 02 51"

benz_addict

the blower motor finally gave out today... looks like I'll be spending 295+tax on a new regulator.

Quadcammer

Don't be silly.

www.parts.com

$195 plus shipping. You'll have it by thursday, latest.

Quadcammer

even better.

azautohaus.com has it for $145 with free shipping.

Enjoy the $150 cost savings.

benz_addict

thanks!

samvel1981

ebay $113.99 + $10.00 shiping

Enjoy the $171 cost savings

benz_addict

There is a new updated part number for the blower regulator. The old ones that go bad were made by BEHR, it's now replaced by BOSCH.



Dealer is asking $730 for the motor... yeah right! Further extensive cleaning of my blower motor solved the problem for now and everything is working like it should, but for how long?

LAWYER2

Is there anyway to conclusively tell if its the blower motor? I have nothing blowing out of the vents no matter what setting

rayk

I have a '04 s430. the blower moror stoped working,then after 5 min. it went back on. Now a month later it is not working completly. I read comments.

Can someone tell me where the blower motor an module is located, so I can take them out to inspect/replace them

thanks in advance for your help
Ray (I hope, some day I can help someone else)

Quadcammer

blower motor is under the passenger side dash. Remove the underdash panels and you should be able to locate it.

rayk

Thanks for the reply.
I pulled off the lower dash panel and cleaned off the plug from the controll unit to the motor(which had some corrosion on it).Pluged it back in and the blower motor works fine
Thanks Ray

arod2303

is this under the dash on the inside of the car? im having the same problem but i want to take a look at the blow motor before i take that drive to the dealer.

arod2303

found diy pictures and found the blow motor now my questions is who knows where i can get a cheap regulator? for a 2000 S500?

hotrod318

azautohaus.com has it for $145 with free shipping.

Jerry-

I have a funny problem with the 2004 S600, as the heating is generally working ok. However, the rear of the car gets better "treatment" than the front. It gets the heat first and earlier.

Shortly after the start, while the front blows warm the rear already blows hot, at the same temperature settings. When I switch on REST then it blows hot in the rear and warm in the front (whatever REST button I press).

That would indicate that the front heat exchanger is faulty, but then there are these moments when the front blows super hot. The windscreen heater always blows hot. In normal operation the front temperature is fine too. Would that be if the heat exchanger is bad?

So I figure that there is either an electronic malfunction or it is a feature setting. The first guy with the car had a driver and I can easily imagine that guy instructing the garage: "the rear of the cabin gets heats first".

How can I investigate the cause? How can I fix it?

SFBIGBODY415

probably the blower motor mine gave out cuz of water. when I took it out it was very wet always check you drain under the hood

Jerry-

How many blower motors are there in the front? Is there a separate one left/right and a separate one for the windscreen heater?

Is it the same blower motor for heating and for cooling?

How many blower motors? This is because at least "one of the blower motors" works in my car.

marktan

I had a similar situation with the rear getting significantly hotter than the fronts, including the symptom of the front actually getting cooler at higher speeds on my 2005 S600. Assuming you've got the rear controls, there is a separate heater core for the front vents (including door pillars) and rear center/floor. I ended up flushing the coolant system and replacing the duo valve and aux heat pump (same assembly, against the firewall under the driver side windshield wiper) and it works like a charm now. Just something to consider looking at. Good luck.