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blower fan stoped working

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Old Feb 2, 2023 | 06:24 AM
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blower fan stoped working
The blower fan on my w212 stoped working .I checked fuse 66 in the trunk but is was empty.Any ideas ? it cold ouside and im freezing
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Old Feb 2, 2023 | 09:35 AM
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W212 M276 DELA 30 ; W211 M113k, W126 M117, W126 OM617, W211 OM642 ; R107 M117 X2, Sierra 1500 LZ0
The blower motors are problematic in these from what I understand. Mine squeaks from time to time, it's located in the passenger wheel well and I don't think is a major pain to replace.
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Old Feb 2, 2023 | 09:42 AM
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I read about a regulator that can also go bad.Where is it located? I want to be sure before replacing components
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Old Feb 2, 2023 | 02:52 PM
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Old Feb 3, 2023 | 02:18 AM
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W212 MY'14 M276-3.5NA @75kMi
No blower.... AAC DTC
The blower speed controller is rather good. The opposite is true with the blower fan. They routinely go bad from tight shaft sleeve.


nice blower controller 👍
This networked speed controller looks well designed to have a chance to last a while.

Don't forget the cabin filter, it's the most overlooked part until thermofuse goes boom.

It is still time to spend 15mn to poke around for +12V. Test power does get to ballast them gets out to fan motor.

Not to mention basic GND paths are often compromised and rain leaks make their way to the speed ballast controller location.

Scan for fault codes, in particular AAC + related live data.


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Last edited by CaliBenzDriver; Feb 3, 2023 at 04:13 PM.
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