W220 S class 2002 blower issues

[acme]

Until recently all was well, started first thing & almost no power from the vents, though AC appears to be working.

Turning off AC makes no difference, still no blower.

Any thoughts at all?

Cheers

[sim16v]

One possibility.

Air intakes under the bonnet clog up with leaves, allowing water to leak in to the blower motor area.

This causes the motor to seize solid.

It happened to mine, so I bought a cheap Chinese motor on Ebay.

It looks identical to the original part and actually worked perfectly.


Totally unrelated, after fixing that, the bloody dash switches and clocks have failed.

I hope that is as easy to fix.

[Zonergem]

Brushes or voltage regulator are also culprits.

This post has some good diagnostic info.

http://www.benzworld.org/forums/w220-s-class/14951...

[Philemon]

My W210 did exactly the same thing at the start of the hottest week... Took the motor out and tested it across a 12v battery and it worked.

Led me to the heater fan blower motor resistor and ordered 192167033475 item number from eBay. Arrived within 10 days £21.99 any fitted it with minor wiring mod in 30 minutes.

Problem solved.

[acme]

Philemon said:

My W210 did exactly the same thing at the start of the hottest week... Took the motor out and tested it across a 12v battery and it worked.

Led me to the heater fan blower motor resistor and ordered 192167033475 item number from eBay. Arrived within 10 days £21.99 any fitted it with minor wiring mod in 30 minutes.

Problem solved.

Many thanks all appreciated.

Implication is that there's no need to remove the motor itself, can you advise where the resistor is?

Shame it's happened when we're in Monaco, with four mates!

[bracken78]

Not the same car so not sure if any help but on our W204 C class the blower motor failed. The AC would still 'kick in' as the engine note would change when turned on or off but no air came from the vents. Replacing the blower motor solved the problem and all has been perfect since.

[Philemon]

You do need to take the motor out to test it. Google Mercedes fan blower motor resistor and you will see that it's not a run of the mill resistor either, but is actually rather more sophisticated. It's more like a loom connected to a switched relay...

[acme]

Thanks again fellas, looks like some of this weekend will be taken up in the footwell of the big Merc.

I'll let you know how we get on.

And as ever if there's any other suggestions, why'll you're in there type recommendations, or hints and tips please let me know. I always like to learn something when doing such jobs, cheers.

[acme]

Bit of an update. We removed the motor, eventually, and tested it seems rather slow so assume it need replacing.

Any suggestions on decent source of a replacement one, or is it the usual ebay??

Need some side indicator bulbs for the mirrors too if anyone's got any suggestions, thanks.

[acme]

Second hand motor purchased & same issue, little or no power!

Any thoughts at all?

The odd thing is the AC off button which is on (i.e. AC off) now won't switch on.

All suggestions appreciated.